dataset string | id string | question string | choices list | rationale string | answer string | subject string |
|---|---|---|---|---|---|---|
mmlu_stem | mmlu_stem_12992 | After spending years searching for a planet with life, scientists may have found one. In September 2010, a team of US scientists discovered a planet called Gliese 581g. It has a surface temperature neither too hot nor too cold for liquid water. Scientists think there is a chance that the planet could have life. The planet Gliese 581g goes around a star called Gliese 581, which is about 20 light-years from Earth. That is about 194 trillion kilometres -500 million times farther away from us than the moon. A spacecraft traveling at a one-tenth of the speed of light would reach Gliese 581g within about 220 years. A human can't live that long, but robotic explorers could make the job easier. However, our fastest spacec raft don't come anywhere near that one-tenth light-speed mark. At present, scientists don't know what the surface might be like on Gliese 581g. What they know is that the planet is at the right distance from its star to have liquid water. It's also at the right distance to have an atmosphere that could protect the water if it is on the surface. Although spacecraft won't be getting there anytime soon, one way to look for life on Gliese 581g is to turn our radio telescopes towards the planet and search for radiation . By studying the radiation, scientists would find out about the chemicals around the planet and discover if Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea whether the planet has life or not. But it'll probably be many years before we can do this properly. People have been arguing about whether there is alien life on Gliese 581g. Any discussion about alien life is just guessing at this point, according to its discoverers. What did scientists find in September 2010? | [
"A planet with water.",
"A planet similar to the earth.",
"A planet without life.",
"A planet near the earth."
] | null | A | |
mmlu_stem | mmlu_stem_19337 | What is present during the day but not at night? | [
"the moon",
"sunlight",
"clouds",
"planets"
] | null | B | |
mmlu_stem | mmlu_stem_9496 | Googlefight is a simple service available on the Internet which offers you the chance to compare two different items and see how many hits they get on the Google search engine. The seemingly simple device has proved invaluable to users, especially to help win arguments. For example, imagine that you and your friends are arguing about who are the most popular music or movie stars, you can decide the argument by writing the names in the Googlefight boxes. Let's say that you are arguing about Jackie Chan and Jet Li. You will quickly discover that Jet Li is mentioned 16 million times on Google pages, whereas Jackie Chan is mentioned a mere 12 million times! In this unscientific way, you can claim victory for one Star over another. But teachers have come up with ways of using Googlefight which are much more useful from an academic point of view, particularly when it comes to studying languages. You can, for example, find out the frequency of two words with the same meaning, and deduce from the answers which one is more common. For example, let's take the words "buy" and "purchase", which mean the same thing (although "buy" is only a verb and "purchase" is both a verb and a noun). It is immediately clear from Googlefight that "buy" is much more commonly used, with a massive three and a half billion hits, compared to only one billion occurrences for the more formal word. But the real value of Googlefight to the language learner is in determining which is the more common of two phrases. For example, "raining cats and dogs" is an old-fashioned English expression about the weather. Do English speakers still use it? Or are they more likely to say "pouring down"? Googlefight suggests the latter. "Pouring down" has 898,000 Google hits, whereas "raining cats and dogs" only has 326,000. With phrases, it's important to remember that you need to use quote marks to make the search more accurate. For example, if you type in the similar phrases "look after" and "take care of " without quote marks, the second phrase seems to be more common, but with quote marks, the result is reversed. What is Googlefight? | [
"A fight between two people on Google.",
"A way to make sure you win an argument.",
"A website showing how many hits two different things have.",
"A list of all the websites on Google."
] | null | C | |
mmlu_stem | mmlu_stem_20706 | Why would soil be more loosely packed than it was the previous day? | [
"the local eagle population",
"the native American population",
"the neighborhood human population",
"the native worm population"
] | null | D | |
mmlu_stem | mmlu_stem_16501 | To the students of Class3 *Examinations start on June22nd and end on June23. *For the PE test, go to the gym. For the music test, go to the Piano Room. All else are written tests. They will be held in classroom3. English June22 8:30 A.M. - 10:00 A.M. Math June22 10:30 A.M.--12:00 A.M. History June22 2:30P.M.--3:30 P.M. PE June23 8:00A.M.--10:00A.M. Music June23 1:00P.M.--3:00P.M. *If you have questions, go to the Teachers' Office before the test. Hand-foot-mouth disease (HFMD), characterized by fever, sores in the mouth and rashes on hands and feet, is not a new infection and is common among(......)infants and children. It is caused by up to 20 types of virus but has similar symptoms . But it usually does not lead to death. Many kindergartens have to be shut because of it. When you have completed a writing task, allow 5-10 minutes to read it and check for mistakes. In particular, look for: *incorrect agreement of subject and verb: My friend likes... NOT My friend like... * incorrect use of tenses * wrong expressions The 2008 Olympic torch which was named "lucky cloud" was lighted on Monday in Ancient Olympia, marking the start of the domestic and international torch relay that will end on August8 with the Games' opening ceremony . The Beijing Games relay is the longest ever planned, lasting 130 days and covering 137,000 kilometers worldwide, traveling to 20 countries. The third news mainly tells us _ . | [
"the incorrect agreement of subject and verb",
"the incorrect use of tense",
"the wrong expressions",
"we should check our writing tasks after we have finished them"
] | null | D | |
mmlu_stem | mmlu_stem_5915 | December usually marks the start of humpback whale season in Hawaii. But experts say the animals have been slow to return. The giant whales are an iconic part of winter on the islands and a source of income for tour operators. But officials at the Hawaiian Islands Humpback Whale National Marine Sanctuary said they've been getting reports that the whales have been difficult to spot so far. "This isn't a concern. But it's of interest. One theory was that something like this happened as whales increased. It's a product of their success," said Ed Lyman. He is a Maui-based resource protection manager and response coordinator for the sanctuary. "What I'm seeing out there right now is what I expected a month ago," said Lyman. He said he was surprised by how few of the animals he saw while responding to a call about a distressed calf on Christmas Eve. "We've just seen a handful of whales." It will be a while before officials have hard numbers. That is because the annual whale counts don't take place until the last Saturday of January, February and March. This is according to former sanctuary co-manager Jeff Walters. "They don't necessarily show up in the same place at the same time every year," Walters said. More than 10,000 humpback whales make the winter journey from Alaska to the warm waters off Hawaii. There, they mate and give birth. Lyman said the whales' absence could just mean they're spending more time feeding in northern waters. That's possibly because of El Nino disruptions. Or it may be because their population has gone up. "With more animals, they're competing against each other for that food resource, and it takes huge energy reserves to make that long migration over 2,000 miles," he explained. What is the passage mainly about? | [
"The migration habit of whales.",
"Why the whales are slow to return.",
"How El Nino slows whale migration down.",
"Worries about the slowdown of whale migration."
] | null | B | |
mmlu_stem | mmlu_stem_16788 | Tom walks into a shop. It has a sign outside: " Second hand clothes bought and sold ." He is carrying an old pair of trousers and asks the owner of the shop. " How much will you give me for these?" The man looks at them and then says, " Two dollars." " What!" says Tom, " I think they are worth at least five." "No," says the man, "They aren't worth a cent more than two dollars." " Well," says Tom. Taking two dollars out of his pocket, " Here's your money. These trousers are hanging outside your shop. The list price of them is six dollars and a half. But I think that is too much money, so I want to find out how much they are really worth." Before the shop owner can think of anything, Tom walks out of the shop with the pair of trousers. From the story we know that _ cheaper than the list price. | [
"the owner sells the trousers two dollars.",
"Tom buys the trousers two dollars",
"the owner buys the trousers four dollars and a half",
"Tom buys the trousers four dollars and a half"
] | null | D | |
mmlu_stem | mmlu_stem_20037 | Gravitational force never affects | [
"balloons",
"stars",
"sunshine",
"air"
] | null | C | |
mmlu_stem | mmlu_stem_16838 | Do you know Fei Junlong and Nie Haisheng? Fei Junlong was born in 1965. He is a Chinese astronaut selected as a member of the Shenzhou program. He was born in Jiangsu and joined the People's Liberation Army Air Force in 1982 at the age of 17. And since then he has only returned home six times. As a fighter pilot , he was selected to an astronaut in 1998. He married Wang Jie in 1991 and has one son. Nie Haisheng was born in September 1964. He is also a Chinese astronaut selected for the Shenzhou program. He is from Hubei. After graduating from high school he joined the People's Liberation Army Air Force, and became a fighter pilot. In 1998 he was selected for the astronaut program. He was one of the three astronauts who were in the final group to train for the Shenzhou 5 fight. Yang Liwei was also picked out for the flight, with Zhai Ahigang. On September 23,2005 it was reported that Zhai and Nie would be one of the three pairs of astronauts who would be in the final training for Shenzhou 6. But in the end, Fei and Nie were chosen, and Zhai missed his chance to space again. Nie Haisheng got married to Nie Jielin and has an 11-year-old daughter. Which of the following is TRUE according to this passage? | [
"Yang Liwei was born in Jiangsu.",
"Nie Haisheng has an elever-year-old daughter.",
"Fei Junlong is one year older than Nie Haisheng.",
"Zhai Zhigang got married to Nie Jielin and has a son."
] | null | B | |
mmlu_stem | mmlu_stem_13212 | On Thursday October 3, Adam Harper decided to stop drinking coffee. Adam is a MBA student at Harvard University. He studies long hours, gets very little sleep and as a result, he drinks a lot of coffee---anywhere from five to six cups a day. Recently, Adam felt that drinking thus much coffee was making it hard for him to sleep at all. He also began having problems with his concentration , and complained of stomachaches. Adam's doctor made this suggestions: stop drinking coffee altogether. When Adam got up on October 3, he began his day without his morning coffee. By 11:00 a.m., Adam was in a terrible mood . He was tired and had a headache. At 11:30, he had a meeting with his student advisor. In the meeting, he found it almost impossible to continue. What was going on? Caffeine, a chemical found in coffee, was most likely the reason for how Adam felt. Caffeine is a stimulant that boosts energy levels and improves concentration- but only for a short time. Lowering caffeine consumption often causes a drop in blood pressure and the result is a "coffee headache", People who stop drinking coffee often say they feel tired and moody, and find it hard to focus. The good news is that these feeling usually pass after four and five days. During this time, doctors suggested taking some aspirin for the headache. So, if Adam can wait, in less than a week, he may be feeling much better. What happened to Adam on Thursday October 3? | [
"He didn't go to his study.",
"He complained about the student advisor.",
"He didn't drink any coffee at all.",
"He decided to stop drinking coffee."
] | null | D | |
mmlu_stem | mmlu_stem_5958 | This might not sound so extraordinary, but I didn't just read a book in print, on an e-reader or even on a mobile phone. Instead, I read a book on dozens of devices . I was not trying to set a Guinness world record. I wanted to answer a question I often hear: which e-reader or tablet is the best for reading books? So I set out to try them all, reading a chapter on each: the Amazon Kindle, the first and second generation Apple iPads and mobile phones. To be fair, I also read a chapter in that old-fashioned form -- an old print paperback. The book I chose was The Alienist. For the first chapter, I turned to an Amazon Kindle. Shopping on Amazon for the Kindle is simple; you go to Amazon's Web site and buy the book, which is then sent to any devices with Kindle software installed . Reading on the Amazon Kindle is a joy in many aspects. The Kindle is light.Its six-inch screen is the perfect size for reading, and reading on its black and white E Ink display doesn't harm your eyes. Battery life is outstanding; on average you charge the device only once a month. My only complaint with the Kindle design is the placement of the keyboard at the bottom of the device. Amazon's CEO has noted during past product announcements that the keyboard is there to help people take notes or search. But to me,it seems like a waste of space. Despite the small screen on a mobile phone, I find reading on one to be simple and satisfactory. All of the mobile phones on which I read chapters felt somewhat similar; although screen brightness and the size of the phone's screen did vary. If I had wanted to, I could have bought my book through dozens of e-book apps in the Apple App Store. Most are free and offer access to thousands of free e-books or paid versions. But the big downside for many is that you can read them only on Apple devices. Both iPads 1&2 offer an immersive reading experience. I found myself jumping back and forth between my book and the Web, looking up old facts and pictures of New York City. I also found myself being sucked into the wormhole of the Internet and a few games of Angry Birds rather than reading my book. For the last chapters of the book, I read the paperback, which is still my favourite choice. Since we are comparing devices so I guess I need to choose one. In the end it might come down to Kindle. But if money is tight, go for print. My used paperback cost only$4 from Amazon. According to the passage, which of the following statements on the Amazon Kindle is NOT TRUE? | [
"Its battery can last for a long time.",
"Its keyboard is kept in the proper position.",
"It is easy to carry and the screen size is proper.",
"It is comfortable for eyes because of its E Ink display."
] | null | B | |
mmlu_stem | mmlu_stem_21939 | In December around 3pm I will avoid using | [
"time travel",
"planets",
"magic",
"sungoggles"
] | null | D | |
mmlu_stem | mmlu_stem_22278 | Salamanders might be found under | [
"garden statues",
"spaceships",
"business suits",
"love"
] | null | A | |
mmlu_stem | mmlu_stem_7117 | Fix it on your own Did you know that a bowl of rice could save your iPod if you drop it in a swimming pool by accident? Or that the camera on your phone could tell you what's wrong with your TV remote control? The experts at Geek Squad (geelsquad.co.uk) have made a gadget rescue guide.So, let's take a look at some of their useful advice. How to get more juice out of your phone batter If your battery goes dead but you need to get a number or send one last text, try warming it up.That may give you a tiny bit of power.Take the battery from the phone and rub it between your hands.Or warm it under your arm for a few minutes.Then try to start the phone but use it quickly. What to do if your gadget gets wet First, try drying it out with a vacuum cleaner .If a vacuum cleaner isn't at hand, fill a pot or bowl with uncooked rice and put your wet gadget inside.The dry, uncooked rice will absorb all the water and, after a few hours, you should be able to use the gadget.Don't forget to remove the battery and SIM card before you dry it. What to do if your TV remote control stops working If replacing the batteries doesn't work, get the camera function up on your phone and point the remote at the lens .When you press a button on the remote, if it is working, the glass bobble at the front of the remote will light up when you look at it on the screen of your phone.This is because the screen on a phone or digital camera picks up infrared rays , even though your eyes don't.If the glass bobble doesn't light up, the remote is broken.If it does, the receiving device is broken. Why can a phone be used to prove the TV remote control works well? Because it can _ . | [
"improve the TV remote control",
"receive infrared ray",
"picture the TV remote control",
"reflect infrared ray"
] | null | B | |
mmlu_stem | mmlu_stem_14467 | I went to technology _ where people were showing their ideas for better learning. At the show I got a chance to try out lots of new, interesting equipment that might be introduced to schools. I thought some of it were great and would make learning more fun. Cyber Coach Mat The first thing I tried was the Cyber Coach Mat. This allows children to learn things like yoga and tai chi with virtual instructors . Also you can play football or have dance battles on it. Sony PSP The second piece of equipment I tried was the Play Station Portable. or PSP. It lets you access lots of education materials and helps learning in many ways. It's really fun and even has a built-in camera and video so you can have fun with friends. Lego NXT The final thing I tried was the Lego NXT. This involves building a robot and programming it to follow instructions . The robot can pick up sound waves which can then be sent to the computer or a phone. I would really like to do this kind of thing in my lesson! Overall the fair was great and I learn how to use a lot of things that I think could really help children to learn and have fun at the same time. My favourite was the Cyber Coach Mat because it allows you to learn new skills and it"s a great way to do a PE lesson if it's cold and raining outside! The robot can be controlled by _ . | [
"letters",
"sounds",
"pictures",
"telephones"
] | null | B | |
mmlu_stem | mmlu_stem_14592 | One day, I went to see my last patient, an old woman. In the doorway, I saw she was struggling to put socks on her swollen feet in the bed. I stepped in, spoke quickly to the nurse, read her chart noting . I was almost in the clear that she was not in serious condition. I asked, "Could I help put on your socks? How are you feeling? Your sugars and blood pressure were high but they're better today. The nurse mentioned you're anxious to see your son. He's visiting you today. It's nice to have a family visit. I think you really look forward to seeing him." "Sit down, doctor. This is my story, not yours." She said with a serious voice. I was surprised as I helped her with the socks. She told me that her only son lived across from her house, but she had not seen him for five years. She believed that was the main cause of her health problems. After hearing her story and putting on her socks, I asked if there was anything else I could do for her. She shook her head no and smiled. All she wanted me to do was to listen. Each story is different. Some are detailed and others are simple. Some have a beginning, middle and end but others don't have clear ends. Some are true but others not. Yet all those things do not really matter. What matters to the storyteller is that the story is heard -- without interruption or judgment . It was that woman who taught me the importance of stopping, sitting down and truly listening. And, not long after, in an unexpected accident, I became a patient. 20 years later, I sit all the time -- in a wheelchair. For as long as I could, I continued to see patients from my chair. I believe in the power of listening. What did the old woman think caused her health problems? | [
"Her son's not seeing her.",
"No one listening to her story.",
"The medical care of the hospital.",
"The distance between her and the doctor."
] | null | A | |
mmlu_stem | mmlu_stem_11937 | A four-wheeled robot,known as Rover,has been tested by a team at Sydney University.It was used to move a herd of cows from a field to a dairy . Researchers were amazed at how easily cows accepted the presence of the robot.They were not disturbed by it and the gathering process was calm and effective.Because the robot moved in a steady manner it allowed cows to move at their own speed,which was important in reducing injuries among cattle,said Dr Kendra Kerrisk,dairy researcher and associate professor. The robot was adapted from one that was already being used to monitor fruit and trees on farms.A team at Sydney University's Centre for Field Robotics improved the robot so that it could be put in a field with cows in order for the researchers to gather data on robot--cow interaction. The robot needs to be operated by a human but it's hoped that in the future a version can be developed that will be fully automated.As well as gathering cows a new version could also collect information useful for farmers. Using robots to get cows to the dairy will be better for their well-being."The research is in its very early stages but robotic technologies certainly have the potential to transform dairy farming,"said Dr.Kerrisk."When we have discussed this concept with farmers they have been extremely excited and we have had a series of calls and emails asking how they can get hold of one,"she added. The robot could also cut down the number of accidents involving humans on farms.Most dairy farmers in Australia use bikes to round up their cattle and they are one of the leading causes of injury.The team hopes that by using the robot to do the job instead,accident rates could fall. The robot Rover was mainly used to _ . | [
"milk the cows on the field",
"feed the cows with food",
"round up cows on dairy farms",
"take farmers around the farm"
] | null | C | |
mmlu_stem | mmlu_stem_1284 | Which mass is undergoing the greatest amount of acceleration? | [
"1 kg subjected to a force of 1 N",
"1 kg subjected to a force of 100 N",
"100 kg subjected to a force of 1 N",
"100 kg subjected to a force of 100 N"
] | null | B | |
mmlu_stem | mmlu_stem_16511 | Bob has a good friend, Caesar. He is a brown dog. He is not very old. Bob gets him from Mr. Mason. One day Bob's father, mother and Bob go to the Mason's farm for lunch. After lunch, Mr. Mason says, "I'm going to a big city. So I can't take him there. You can't have a young dog in a big city." " Let me have him, Mr. Mason. He knows me well and we have no dog, " Mr. Mason looks at Bob's mother and father. "Please , Mother, let me have him," says Bob. "Ask your father," says she. "Please, Dad?" "Yes, you can have him." "Thank you, dear dad. Thanks, Mr. Mason. Come here, Caesar." "See! The dog is his now," says Mr. Mason. What color is Caesar? It's _ . | [
"black",
"yellow",
"brown",
"white"
] | null | C | |
mmlu_stem | mmlu_stem_4419 | Molly was a peasant girl. Her parents did not have much money and Molly did not have many nice clothes. One day Molly's father said to her, "Molly, take this pot of milk to market and sell it. You may keep the money." Molly was very happy. She put the pot of milk on her head and started her journey to market. While she was walking alone she began to think. "I will get quite a lot of money for this milk," she thought. "What will I do with the money? I will buy a lot of eggs. I will take the eggs home with me. One of our hens will sit on them. Then there will be lots of little chickens. I will not sell the chickens. They will grow into hens. Then there will be more eggs. And these eggs will give me still more chickens. Soon I will have hundreds of hens. Then I will sell them all. They will bring me a lot of money. I will be rich. I will buy lots of new clothes. I will always wear nice clothes. Then a rich man will marry me. We will have a beautiful house, a big car and nice children..." Molly was very happy. She jumped into the air. The pot of milk fell from her head onto the road. And that was the end of all her dreams. In English there is a proverb. It says: Do not count your chickens before they are hatched . On her way to market, Molly began to _ . | [
"count her eggs",
"have a happy dream",
"think of her happy family life",
"think how to sell the milk"
] | null | B | |
mmlu_stem | mmlu_stem_21315 | What can you point to as an example of water vapor? | [
"a mountain that looks like a bear",
"the smoke coming from a distant fire",
"a group of birds that looks like a wine glass",
"a white puff in the sky that is shaped like a bird"
] | null | D | |
mmlu_stem | mmlu_stem_12722 | Lidong came on November 8 this year. It is the Chinese word for one of the 24 solar terms . It means the beginning of winter. As the weather gets colder and there is less sunlight, people are more likely to get sick. Adults in the US usually have two to four colds each year. Young children suffer from six to eight colds per year, especially in winter months, according to the American Lung Association. One of the best ways to keep healthy during winter is to stay warm. There are many ways to stay warm. A living room should be around 18-21 C, and you can also use a hot water bottle or at least 16 C. blanket to keep warm while in bed. Getting plenty of exercise is always a good idea. Take a walk on a sunny afternoon, do a long distance run or skip rope. These things keep your blood moving and your metabolism fired up. Food gives us energy and helps to warm us from the inside. High-protein foods, like fish and meat, provide a lot of energy. Add some things to your winter dishes, such as ginger, pepper and garlic. These things can make you warm. A winter coat warms you up from the outside. Add several layers of thin clothing, for example, a shirt and a thin sweater, to stay even warmer. Clothes made from wool are usually very warm. How to make winter days colorful? Is it too cold to play outside? Don't worry. Here are some tips for having fun at home. Give it a try! # Enjoy a movie with your parents. There are a lot of choices, such as Spy Kids. You can also talk about the movie with your parents after it's over. # Cook a meal with your parents. You can cook some simple dishes, such as scrambled eggs with tomato. You may need your mother's help for the first time. # Clean your bedroom. You need to sweep the floor, tidy your desk and make your bed. By doing this, you really help your mother a lot. # Read your favorite book. Reading is not only helpful for your writing ability, but can also help to build your character. The writer writes the passage by _ . | [
"doing research",
"making a survey",
"giving examples",
"having interviews"
] | null | C | |
mmlu_stem | mmlu_stem_13194 | Do you know Walk With A Doc? It is a new program . This program helps people to be healthy. It's not difficult to do it. You only need sports shoes and then go for a walk in a store or a park with two or more people at a time. David Sabgir is a doctor in the U.S.A. He starts the new health program. Every Saturday morning, Sabgir runs in a park and he starts thinking, "I run to help myself to be healthy. But I think I can help more people to be healthy." So he tells his friends and other people about this. They all like the idea. For the first walk, 101 people join. Later , more and more people join this health program. Walk With A Doc is a(n) _ . | [
"exciting game",
"school trip",
"health program",
"sports club"
] | null | C | |
mmlu_stem | mmlu_stem_2885 | Some trees can survive a long time without water. Think of trees that grow in the desert. But other trees may need more moisture than they can get from rainfall or from the air . Trees and other plants can look thirsty. Leaves can become weak and hang downward. They can also turn yellow. Yellowing can be a sign of too much water. But it can also be a warning sign of too little water. With a newly planted tree, the roots have not yet spread out from the root ball. The root ball can become dry faster than the dirt around it. So put water on the area of the root ball and the surrounding soil until the roots become established. Once a tree is well established, water deeply instead of watering often. The amount of water needed depends on the tree and the soil. Clay soils hold water for longer periods while sandy soil holds less water. During the hottest season, a deep watering may satisfy a tree for anywhere from ten days to four weeks. Ted Swiecki is a plant scientist . He says people should not water established trees at the base of the trunk . This can harm the tree. Too much water in the soil at the base of a tree can lead to the growth of fungi . If the area is too wet, harmful organisms have a better chance to invade the tree and cause disease. Mr. Swiecki says this is true especially in Mediterranean and semi-dry climates. Many trees in these climates have adapted to having a dry area near their base during the hottest season. He said, "Water displaces (,)air in the soil. And roots are aerobic ; they require oxygen for the soil to function properly. So if you keep the soil completely wet and there's no air there, then the roots are starving for oxygen." What is the passage mainly about? | [
"It introduces to us different kinds of trees",
"It instructs us how to water trees correctly",
"It teaches us how to tell whether a tree needs water",
"It analyses why different trees need different amounts of water"
] | null | B | |
mmlu_stem | mmlu_stem_21544 | A puppy feels hunger and moves straight to its female parent's nipple. This behavior is | [
"learned",
"instinctive",
"reactive",
"predatory"
] | null | B | |
mmlu_stem | mmlu_stem_8693 | Editor Henry Slocum, I read your May 10th article in the local newspaper Honesdale Times about electronic books, or e-books, with great interest. You made several good points about the disadvantage of e-books. You may have overlooked, however, some of the ways in which they are superior to traditional books. Yes, e-books are expensive, but they are also convenient. In addition, due to their environment-friendly nature, e-books have the potential to change our planets for the better. E-books, for anyone who is unfamiliar with the term, are about the same size and shape as regular books. They have a large screen in the middle, however, this screen shows the reader a page of the text that has been downloaded from a computer. Once the reader has finished reading the page on the e-book screen, he or she scrolls down to see a new page. The process continues until the entire book has been read. As you pointed out, Mr. Slocum, it's great to lie on a warm, sandy beach with a book. You can do that just as easily with an e-book as you can with a traditional paper book. In fact, because e-books are so light, you can carry themselves. Say, for example, that you like to read on the bus. Which would you rather carry with you---a heavy 800-page novel, or an e-book that weighs only a few ounces? Another important advantage is offered by e-books as well. They are more environment-friendly than traditional books. At present, thousands of trees cut down each year to meet the publishing industry's demand for paper. Books that don't sell are eventually returned to the publisher and destroyed, This terrible waste could be avoided if everyone used e-books, which require no paper. Sincerely, David Eng The main purpose of the letter is to _ | [
"explain how to read e-books",
"honor the person who invented e-books",
"scold publishers for wasting so much paper",
"provide evidence that e-books are a good idea"
] | null | D | |
mmlu_stem | mmlu_stem_15589 | A man went to see a doctor."Open your mouth,"the doctor said.Then the man opened his mouth and the doctor looked in quickly. "It's clear what's wrong with you.You need more exercise,"the doctor said. "But,doctor,"the man said,"I don't think..." "Don't tell me what you think,"the doctor said."I am the doctor,not you.I know what you need.I see hundreds of people like you.None of them get any exercise.They sit in offices all day and in front of the television in the evening.What you need is to walk quickly for at least 20 minutes a day." "Doctor,you don't understand,"the man said."I..." "I don't want to hear any excuses,"the doctor said."You must find time for exercise.If you don't,you will get fat and have health problems when you are older." "But I walk every day,"the man said. "Oh,yes,and I know what kind of walking that is.You walk a few feet to the train station from your house,a few more feet from the station to your office,and a few more feet from your office to a restaurant for lunch and back.That's not real walking.I'm talking about walking in the park for twenty minutes every day." "Will you listen to me,doctor?"the man shouted,getting angry with this doctor who thought he knew everything."I'm a postman,"the man went on,"and I walk for seven hours every day." . Why did the doctor not listen to the man? | [
"The postman spoke to him like a doctor.",
"He really wanted to help the postman.",
"He thought he knew the man's problem.",
"The man was slow in speaking."
] | null | C | |
mmlu_stem | mmlu_stem_13154 | Our new neighbours are the Browns. They have two children, a boy and a girl. The boy is Jack and the girl is Alice. Jack is 11, and he is one year older than me. Alice and my sister Nancy are 8 years old. At weekends, Nancy and I like to go to play with Alice and Jack. Both Jack and I really enjoy playing computer games. Sometimes the girls join us, but the games they enjoy are different from the ones we like. There is a big park near our house. Sometimes, when the weather is fine, the four of us will go for bike rides there. We often stop at the huge playground to have some fun. Jack and I like to play basketball, but the girls prefer to sing and dance. Our families often have dinner together. On some days, they come over to our house and on other days, we go over to theirs. Mr Brown and his wife cook really well. Nancy and I are very glad to have the Browns next door. It's great to have friends living so near. How old is Alice? | [
"8",
"9",
"10",
"11"
] | null | A | |
mmlu_stem | mmlu_stem_7750 | When a person travels over long distances, the place may not be the only change. When his or her body rhythms get thrown off, he or she suffers from jet lag -- it's hard to sleep and eat at the right times in the new location. Humans and animals have a biological clock in their body that tells them when to sleep, and when to wake. When someone comes to a different place far away, this biological clock takes a while to match the day and night time of the new place. In a new study, reported in November's Science News, researchers at the University of California, Berkeley tested the effects of jet lag on hamsters . They wanted to know how serious jet lag would affect the brain and thinking habits of the animals. They think what happens to hamsters may happen to humans, too. In their experiments, the researchers first moved the hamsters' schedules forward by six hours. The animals' eating schedules, for example, were changed. If a hamster was often fed at noon and 4 pm, then it ate at 6 pm and 10 pm on the new schedule. People who travel from China to Europe experience the same shift, since the two regions are about six hours apart, half the shift between China and the USA. After three days, the scientists did it again - they shifted the hamsters' schedules forward by another six hours. Three days after that, they did it again; and then again three days later. For a full month, the scientists changed the hamsters' routines every three days. During the study, the hamsters slept the same amount every day as they did before the study. However, their sleep patterns had a hard time keeping up with the changing schedule. What's more, they seemed to feel low. The researchers also found that the hamsters had trouble with basic learning exercises during the study. The animals' thinking problems didn't go away when the experiment was over. A month after they went back living on a normal schedule, the hamsters still had trouble with basic mental tasks, such as learning and memory. The scientists concluded that serious jet lag has serious side effects, including stupidity . They are now trying to find out how jet lag is causing these problems, and then it will be possible for them to work out a solution. We can infer from the text that _ . | [
"The experiments were carried out on a jet plane",
"It is unclear how to avoid jet lag's side effects now",
"Side effects of jet lag will remain in one's whole life",
"Only humans and hamsters have a biological clock"
] | null | B | |
mmlu_stem | mmlu_stem_18471 | An artificial pacemaker is a device that regulates the beat of the heart by an electrical stimulus. Some early pacemakers were powered by batteries and were worn externally with wires passing through the skin to the surface of the heart. Modern pacemakers are now much smaller and are implanted surgically. Which most likely has increased the lifespan and effectiveness of artificial pacemakers? | [
"the development of thinner wires",
"the invention of lithium batteries",
"mass production of pacemaker parts",
"reducing the cost of producing pacemakers"
] | null | B | |
mmlu_stem | mmlu_stem_13524 | Barry and Kim are twin brother and sister. But they like different sports. Barry likes soccer. He is in the school soccer club, and he plays soccer every day. He has 9 soccer balls in his bookcase. He also likes volleyball. He has 2 white volleyballs and 2 blue volleyballs. But Kim doesn't like soccer or volleyball. She likes tennis. Tennis is interesting. She is in the school tennis club and she plays tennis every day. She has 7 tennis balls and 2 tennis rackets in her room. She also likes baseballs. She has 5 baseballs: 2 green baseballs and 3 yellow baseballs. ,. Which of the following is NOT true ? | [
"Barry is Kim's brother.",
"Barry plays soccer every day.",
"Kim doesn't have tennis rackets.",
"Kim has 2 green baseballs."
] | null | C | |
mmlu_stem | mmlu_stem_13146 | Animals, including insects , don't have a 'language' like ours. They do not 'talk' to each other in words and sentences . But if we watch them, we can see that they have their ways of communicating with each other. Can you see the rabbit's tail? When rabbits see this white tail moving up and down, they run away. They know that they are in danger. The rabbit told them something without making a sound. It has given them a signal . Many other animals use this kind of 'language'. When a cobra is angry, it raises its head and makes itself look powerful . This warns other animals. When a bee found some food, it goes back to its home. It cannot 'tell' the other bees where the food is by speaking to them, but it does a little dance. This tells the bees where the food is. Some animals 'say' things by making sounds. A dog barks, for example, when a stranger comes near. A cat purrs when it is pleased. Some birds make several different sounds, evry sound has its own meaning. Sometimes we human beings speak in the same way. We make sounds like"Oh" or "Ah" when we are afraid or happy or when we drop something on our toes. Which one is TRUE according to the passage? | [
"Animals have languages like human beings.",
"Bees communicate with each other by dancing.",
"Animals can use words.",
"Animals are brave."
] | null | B | |
mmlu_stem | mmlu_stem_21724 | A sea cow would be most uncomfortable in | [
"a desert",
"a fjord",
"an ocean park",
"lots of water"
] | null | A | |
mmlu_stem | mmlu_stem_8327 | This will make you think twice about dismissing the physical abilities of women. Serena Williams If know Serena Williams, then you know better than to harbor any illusions that you can take on the top female tennis player even on your best day. Nicknamed by the media as the Queen of the Court, she has won 19 Grand Slam singles titles and 13 Grand Slam doubles titles as of May 2015. By the way, she can send the ball hurtling towards your face on the excess of 120 miles per hour on her serve. Ronda "Rowdy" Rousey Former Olympic judo gold medalist Ronda 'Rowdy' Rousey has been dominating women's MMA for the past several years. She earned the nickname "The Arm Collector" for winning the majority of her fights via armbars. As of May 2015, no other female MMA has put up much of a challenge against Rousey, but some think that the next entry on this list just might give her trouble. Cristiane 'Cyborg' Justmo Many believe that Cris Cyborg will give Rousey trouble and may even have an outside chance of beating her. While Rousey is an excellent grappler owing to her judo background, Cyborg is a more well-rounded fighter with excellent standup and groundwork skills. This means that just like Rousey, Cyborg can lay some serious beatdown on you. Missy Franklin So you think you are a good swimmer. Well, no matter how good you think you are, you'll very likely still be eating Missy Franklin's pool dust. Missy is a four-time Olympic gold medalist and has also won a bunch of gold medals in the World Championships. Mirinda Carfae Do you think you can swim 2.4 miles, ride a bike for 115 miles, and still have enough gas to run for 26 miles? Mirinda Carfae certainly can and she proved that she can do it faster than any woman winning the Ironman World Championships women's division in 2010, 2013, an 2014. Rousey earned the nickname "The Arm Collector" because | [
"She has been dominating women's MMA for the past few years",
"She defeated most of the fighters with her armbars",
"She can collect the strength of the other fighters with her armbars",
"She has trouble in fighting without her armbars"
] | null | B | |
mmlu_stem | mmlu_stem_6486 | An elderly woman died and several other passengers were critically injured when a crowded Virgin express train crashed in Cumbria last night. A huge rescue operation involving RAF helicopters and dozens of ambulances arrive. After passengers were trapped in the train for more than four hours because fallen power line poles made access for emergency workers difficult. Authorities reported up to 80 injuries. Thirteen people were taken to hospital in a" _ or serious condition." Between 180 and 200 passengers were on the 5:15pm Virgin service from London Euston to Glasgow Central when all nine carriages left the rails between Oxenholme and Tebay. Witnesses said that the train shook violently before toppling over into an embankment with at least four carriages overturning. Early this morning, authorities confirmed an elderly woman had died and some other passengers had suffered injuries including back strains, head wounds and broken bones. Ruth Colton, a passenger on the train, said she was reading a book when the journey became uncomfortable. It seemed that the train was being beaten by heavy winds,"as if we were on a plane". The accident brought concerns that Britain's busiest rail route would be crippled for some time. The line between Preston and Carlisle was postponed as Virgin Trains promised a rapid investigation into the "serious incident"--the company's first big crash. It is understood that the investigation will examine whether there was an obstacle on the track and the possibility of speeding or mechanical breakdown. The driver, who was injured, will be interviewed and a black-box recorder installed in the train will be examined. Which of the following is the possible cause of the accident? | [
"Careless driving.",
"Heavy wind.",
"Over loading.",
"Obstacle on the track."
] | null | D | |
mmlu_stem | mmlu_stem_14946 | When a computer works on a group of programs,it can get very hot.Cooling the computer can cost a lot.So some scientists wonder what would happen if the heat from the computer could beused. Large Internet companies such as Google and Microsoft have thousands of computers.As these computers deal with information,they produce lots of heat,so they need huge cooling systems .These systems send the heat in to the air. A company in Holland thinks paying to make the computers work and then paying again to cool them are a waste of energy.So the company developed a special device-thee-Radiator. Boaz Leupe,head of the company,says that e-Radiator works as a heating system and saves money.He explains that the energy is used twice-once to heat the home and once to cool the computer and that the users don't have to pay to cool their computers. Five homeowners in Holland are testing the heating system in their homes. "We pay for the computer using,so,in that way,homeowners get heating for free,"Boaz says.Jan Visser is one of the homeowners."If you use the computer more,the e-Radiator producers more heat,"he says,"It cannot provide enough heat if you don't use your computer often."But he is ready to try it.It's a great help for his family. The company says e-Radiators produce heat temperatures of up to 55degC.It says the system could save its users about 440 a year. Before the e-Radiator appears,usually the heat of a computer _ . | [
"is sent into the air",
"helps the five homeowners",
"is used twice",
"makes the computer work better"
] | null | A | |
mmlu_stem | mmlu_stem_18084 | A scientist was examining a large boulder that was covered with lichens (a combination of fungi and algae). He chipped a piece of the rock and placed it under a microscope. He observed that the surface of the rock was breaking down underneath the lichen. Which was the scientist most likely observing? | [
"the interaction between abiotic factors",
"the effects of chemical weathering",
"the process of deposition",
"the effects of abrasion"
] | null | B | |
mmlu_stem | mmlu_stem_21721 | Which of these might use plants for an energy source | [
"television",
"station wagon",
"toy car",
"action figure"
] | null | B | |
mmlu_stem | mmlu_stem_1342 | In pea plants, tall is dominant over short. What size pea plants would result when two short plants are crossed? | [
"short plants only",
"short and tall plants",
"tall plants only",
"middle-sized plants"
] | null | A | |
mmlu_stem | mmlu_stem_12488 | "Tom? Are you in bed yet?" called Mrs White. There was no answer. Mrs White put down her book and went to her 14-year-old son's room. Tom was sitting in front of a bright computer screen on which a colourful dragon jumped and shouted. "Oh, Tom! You're still playing on that computer. You must stop now. It's half past eleven. If you don't go to bed soon, you'll be very tired tomorrow," said Mrs White. "But I've nearly beaten the dragon," said Tom. Mrs White could see the excitement on her son's face. She sat down beside him. "You are always playing on that computer. You spend more time with this machine than with your family," she said with a smile. "What's special about it? Show me what it can do!" "I think this is a great computer, Mum!" he said happily. "The hardware is good. There's so much memory and it has some wonderful software programs. This game, 'Dragon Player', is my favourite, but I sometimes borrow games from Daniel and other friends. I don't have to worry about any infected disks because I have a virus detector which can go over any disk and check it for viruses. Let me show you!" Tom began tapping. The screen changed in answer to his orders. "Oh, Tom," laughed Mrs White. "I'm sure it's a wonderful computer, but I'm afraid I don't know what you're talking about." What do we know about Mrs White? | [
"She loves her son too much.",
"She loves computer games too.",
"She is very hard on his son.",
"She is as wonderful as the computer game."
] | null | A | |
mmlu_stem | mmlu_stem_16651 | During the day we work and play, and at night we sleep. Our bodies rest while we are sleeping. In the morning we are ready to work and play again. When we are asleep, our bodies grow most. When children feel tired and angry, they usually need more sleep. We can get our lessons better, and we feel better, too, when we have enough sleep. Boys and girls, eight or nine years old, need ten hours of sleep every night. Our bodies need plenty of air when we sleep. If we do not get enough fresh air we wake up feeling tired. While in bed we must not cover our heads. If we do, our lungs will not get enough fresh air. If we open our windows at night we can have plenty of fresh air. Cool air is better than warm air. Boys and girls must get plenty of sleep if they want to grow and be strong. How can you get enough fresh air at night? You can _ . | [
"open your windows",
"not sleep in bed",
"sleep ten hours",
"cover your head"
] | null | A | |
mmlu_stem | mmlu_stem_18478 | Deer live in forest for shelter. If the forest was cut down, which situation would most likely happen? | [
"The deer would find shelter in a different habitat.",
"The deer would wait for the forest to grow back.",
"The deer would move to another forest area.",
"The deer would change the type of foods they eat."
] | null | C | |
mmlu_stem | mmlu_stem_13850 | Everyone knows that exercise is important.We all need to _ .Doctors say it is good for us.it makes your heart and body _ .When the daytime comes, we must get up. This is the time for exercise. Exercise means doing things with the body. Children who often exercise are more alert .This means they do better in tests and schoolwork than those who don't exercise. There are _ ways to exercise.You can walk, run, swim, skate, or play ball games, Make sure you exercise in the following ways:you have to like what you're doing. Exercise enough but not too much.it's best to exercise _ each week .Thirty minutes each time is enough.Try all kinds of thing until you find one, two or even three sports that feel right for you. You can exercise at _ .They have a lot of equipment there. The equipment will help exercise your arms, legs and other parts of body to make you fit.Some people buy equipment for their homes.But it is very expensive. Exercising can be fun.Friends can exercise together at a fitness center, or they can Play sports together.How do you exercise? The best way to exercise is do it _ . | [
"once a week",
"sometimes",
"twice a month",
"twice a week"
] | null | C | |
mmlu_stem | mmlu_stem_1604 | There once was a pumpkin. The pumpkin was sad. The pumpkin wanted to leave the garden and see the world. But the pumpkin had to stay in the garden because its vine held it there. One day a fox came by. The pumpkin asked the fox to cut the vine so the pumpkin could leave the garden. The fox said it would cut the vine so the pumpkin could leave the garden. When the fox cut the vine the pumpkin could roll around. The pumpkin rolled around until it got out of the garden. First it met a cat. It told the cat it was happy because now it could see the world. The cat gave the pumpkin a piece of cake to eat. The pumpkin could not eat the cake because it had no mouth but it was still very happy to have the cat as a new friend. Who did the pumpkin meet outside the garden? | [
"another pumpkin",
"the person who planted the garden",
"a cat",
"a fox"
] | null | C | |
mmlu_stem | mmlu_stem_17552 | What keeps Mars in orbit around the Sun? | [
"friction",
"gravity",
"magnetism",
"solar power"
] | null | B | |
mmlu_stem | mmlu_stem_16330 | Hello,everyone.let me introduce myself.My name is Wang Mei.I'm 1.7 metres tall.My eyes are black.I have long red hair.My favourite colour is blue.My favourite clothes are dresses.I feel happy every day because I have many friends.They look different,but they are very kind to me.Jenny has short blond hair.Her eyes are brown.She is 1.65 meters tall.Li Ming is my friend ,too.He has short black hair.He is 1.7 metres tall,too.Danny has three hairs and they're green.His favourite colour is green .He is 1.6 metres tall. Is Li Ming's hair short or long? | [
"Yes,it is short.",
"Yes,it is long.",
"It's short.",
"It's long."
] | null | C | |
mmlu_stem | mmlu_stem_13166 | You've probably heard of working dogs that help police officers, or horses that help farmers. Did you know that carrier pigeons can be trained to help people too? Here are some examples. Mailman Carrier pigeons can be trained to carry messages to people. The note is placed into a small can. The can is tied to the pigeon's leg. Then the pigeon flies off with the note. Lifeguard From high up in the sky, specially trained pigeons can find orange life jackets in the ocean. Sometimes it is difficult for humans to find people lost at sea, especially when the weather is bad. However, pigeons can fly quickly over a large area of water to look for people. Spy Many years ago, carrier pigeons were used to help our country during wars . "Spy pigeons" had small cameras that were tied to their feet. As a pigeon flew over enemy land, the camera took photos of the land below. This would allow our soldiers to see where the enemies were and what they were doing. So next time you see a pigeon, stop and watch it closely. What might look like an ordinary bird to most people, might actually be helpful. What is the purpose of writing this article? | [
"To make readers like pigeons more.",
"To teach readers about the lives of wild pigeons.",
"To tell readers about real jobs held by carrier pigeons.",
"To share science fictions about pigeons helping people."
] | null | C | |
mmlu_stem | mmlu_stem_3581 | Tamara walked through the night to the little house where her </PGN0103.TXT/PGN>old nurse lived. The old woman gave her a meal. Then Tamara went out to get a car. She had enough money with her to pay for the use of a car for a few days. She wanted to go into town and see a friend, a teacher of science. She had to sit through the second part of a class before she was able to speak to him. But then he took her to his office and listened to her. She told him that she wanted to build houses on some land her husband had owned. But first she must clear it of unwanted plants. She wanted something that would kill them. Her friend wrote down a name on a piece of paper and told her to take it to a shop he knew. "You will need lots of it." he said. "Put it in water and spread it over the plants." How many people are mentioned in this passage? | [
"3",
"4",
"5",
"6"
] | null | B | |
mmlu_stem | mmlu_stem_10120 | Register in person Register by phone Register by mail 1781 N. Winchester ST. Call 264 8833 Use form given Chicago Basic Photography This is an eight-hour course for beginners who want to learn how to use a 35mm camera. The teacher will cover such areas as kinds of film, light, and lenses . Bring your own 35mm camera to the class. Course Charge: $150 Jan. 10, 12, 17, 19, Tues. & Thurs. 6-8p.m. Marianne Adams is a _ photographer whose photographs appear in many magazines. Understanding Computers This twelve-hour course is for people who don't know very much about computers, but who need to learn about them. You will learn what computers are, what they can and can't do, and how to use them. Course Charge: $75 Equipment Charge: $10 Jan. 7, 14, 21, 28, Sat. 9-12 a.m. Joseph Saimders is a professor of computer science at New Urban University. He has over twelve years of experience in the computer field. Stop Smoking Do you want to stop smoking? Have you already tried to stop and failed? Now it is the time to stop smoking using the latest methods. You can stop smoking, and this twelve-hour course will help you do it. Course Charge: $30 Jan. 4, 11, 18, 25 Mon. 4-7 p.m. Dr. John Goode is a practicing psychologist who has helped hundreds of people stop smoking. Typing This course on weekdays is for those who want to type as well as those who want to improve their typing. You are tested in the first class and practice at one of eight different skill levels. This allows you to learn at your own speed. Each program lasts 20 hours. Bring your own paper. Course Charge: $125 Materials Charge: $25 Two hours each evening for two weeks. This course is taught by a number of business education teachers who have successfully taught typing courses before. A course which can do something good for your health will cost _ . | [
"$50",
"$30",
"$10",
"$125"
] | null | B | |
mmlu_stem | mmlu_stem_10951 | Visiting animals in their natural homes may sound like a great idea that helps to save them, but is it ? Researchers writing in Trends in Ecology & Evolution on Oct9 said that the interactions between wild animals and friendly eco-tourists who want to take their pictures may put animals at greater risk of being eaten. It is clear that many people visit protected areas every year. "Recent data showed that protected areas around the globe have 8 billion visitors per year; that's like each human on Earth visited a protected area once a year, and then some!"said Dainel Blumstein of the University of California, Los Anglels. "This amount of nature tourism and eco-tourism can be added to the long list of ways in which humans cause fast environmental change. The basic idea of the report the report is that humans change the ways animals act and those changes might affect other parts of their lives, according to Science Daily. Those changes in behavior and activity may put animals at risk. "When animals spend time in 'harmless' ways with humans, they may let down their guard," Blumstein said. As animals get used to feeling comfortable with humans, they may become braver in other situations, he says . "If this bravery continues when they meet real predators , then they will die more often when they meet them." Eco-tourism is in some ways similar to making animals live in human homes or in cities. In all three cases, regular interactions between people and animals tame. Evidence has shown that silver foxes that live with people become more laid-back and less fearful; this results from evolutionary changes but also from spending time with humans. Simply put , as Blumstein asked in the Scientific American magazine:"Does eco-tourism make animals _ ?" And that's not all - humans can also scare away natural predators , creating the so-called "human shield effect" and a safe environment for smaller animals that might make them braver, too. When humans are around, for example, vervet monkeys don't see as many leopards trying to eat them. Blumstein says they hope to do more research into humans' interactions with wildlife. Scientists will "now have to understand better how different species and species in different situations react to humans and when humans might put them at risk. We can infer that the writer wrote this passage mainly to _ . | [
"explain what eco-tourism is",
"tell us something interesting about Nature",
"suggest that we stop eating meat to save animals",
"Wildlife tourism may seem helpful, but it can be deadly for some animals"
] | null | D | |
mmlu_stem | mmlu_stem_9556 | The freezing Northeast hasn't been a terribly fun place to spend time this winter, so when the chance came for a weekend to Sarasota, Florida, my bags were packed before you could say "sunshine". I left for the land of warmth and vitamin C(C), thinking of beaches and orange trees. When we touched down to blue skies and warm air, I sent up a small prayer of gratefulness. Swimming pools, wine tasting, and pink sunsets(at normal evening hours, not 4 in the afternoon) filled the weekend, but the best part- particularly to my taste, dulled by months of cold- weather root vegetables- was a 7 a.m. adventure to the Sarasota farmers' market that proved to be more than worth the early wake-up call. The market, which was founded in 1979, sets up its tents every Saturday from 7:00 am to 1 p.m, rain or shine, along North Lemon and State streets. Baskets of perfect red strawberries, the red-painted sides of the Java Dawg coffee truck; and most of all, the tomatoes: amazing, large, soft and round red tomatoes. Disappointed by many a broken, vine-ripened promise, I've refused to buy winter tomatoes for years. No matter how attractive they look in the store, once I get them home they're unfailingly dry, hard, and tasteless. But I homed in, with uncertainty, on one particular table at the Brown's Grove Farm's stand, full of fresh and soft tomatoes the size of my fist. These were the real deal- and at that moment, I realized that the best part of Sarasota in winter was going to be eating things that back home in New York I wouldn't be experiencing again for months. Delighted as I was by the tomatoes in sight, my happiness deepened when I learned that Brown's Grove Farm is one of the suppliers for Jack Dusty, a newly opened restaurant at the Sarasota Ritz Carlton, where- luckily for me- I was planning to have dinner that very night. Without even seeing the menu, I knew I'd be ordering every tomato on it. What can we learn about tomatoes sold in New York in winter? | [
"They are soft.",
"They look nice.",
"They taste great.",
"They are juicy."
] | null | B | |
mmlu_stem | mmlu_stem_20815 | Bread makers only run if you have | [
"an extension cord",
"adamantium claws",
"a power cord",
"dirt and gravel"
] | null | C | |
mmlu_stem | mmlu_stem_3905 | You hear this,"No wonder you are fat.All you ever d0 is eat."You feel sad."I skip my breakfast and supper.I run every morning and evening.What else can I do?" Basically you can do nothing.Your genes,not your life habits,determine your weight and your body constantly tries to maintain it. Albert Stunkard of the University of Pennsylvania found from experiments that"80 percent of the children of two fat parents become fat,as compared with no more than 14.percent of the children of two parents of normal weight." How can obese people become thinner through dieting? Well,dieting can be effective.but the health costs are great. Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were.given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost on average 45 kg.But after leaving the hospital,they all regained the weight. The results were surprising:by metabolic measurement,fat people who lost large amounts of weight seemed like they were starving.They had psychiatric problems.They dreamed of food or of breaking their diet They were anxious and depressed.Some wanted to kill themselves.They hid food in their rooms. Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state lust like that of starved non.obese people. Thin people, however,suffer from the opposite.They have to make a great effort to gain weight Ethan Sims of the University of Vermont got prisoners to volunteer to gain weight.In four to six months--they ate as much as they could.They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended,they were back to normal weight and stayed there. This did not mean that people are completely without hope in controlling their weight.It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly 1ower their weight. The findings also provide evidence for something scientists thought was true--each person has a comfortable weight range.The range might be as much as 9kg.Someone might weigh 60--69kg without too much effort.But,going above or below the natural weight range is difficult.The body resists by feeling hungry or full and changing.the metabolism to push the weight back to the range it seeks. From the text,we know that the body can still feel comfortable | [
"when the weight goes up or down by 6 kg",
"when the weight goes up or down by l0 kg",
"when the weight is increased by 20 to 25 percent",
"when the weight is decreased by 20 to 25 percent"
] | null | A | |
mmlu_stem | mmlu_stem_9526 | He was just 12 years old when he died. But he brought courage and hope to people around the world. Nkosi Johnson, who died last June, is remembered today as an AIDS fighter. This young boy challenged his government's AIDS policies and millions of South Africans in the fight against the disease. Johnson was the longest survivor born HIV positive .He survived with this deadly disease for 12 years before it _ . At first, Johnson was expected to live for nine months when his foster mother , Gail Johnson took him in at the age of two. She now runs Nkosi's Haven across town from her house in Melville. The Haven is home to 20 children living with HIV or AIDS, and 11 of their mothers. Johnson attracted the world's attention and stole the hearts of thousands of people across the world at the 13thInternational AIDS Conference inprefix = st1 /Durbanin July 2000. He stood in front of a large audience including South African President Thabo Mbeki. He told them that he wanted AZT, a drug used to treat AIDS patients, to be given to HIV-positive pregnant women to prevent the disease being passed on to their unborn babies. He received a loud cheer at the end of his speech. Johnson's speech was broadcast live across the world. With views beyond his age and even a sense of humor, Johnson soon became an international sign of the fight against AIDS and HIV. The best title for this passage is _ . | [
"The Sad Story of an AIDS Child.",
"The Courage of AIDS Children",
"AIDS, a Deadly Disease",
"A Hero inSouth Africa"
] | null | D | |
mmlu_stem | mmlu_stem_9597 | We spend lots of our lives in the school, getting knowledge, developing ourselves and growing up. It is so important that the school provides a pleasant environment. So all the students must do the following: In the Classrooms All classes must have a duty book. Classrooms must be clean and tidy. Waste paper baskets should be emptied before the first lesson every morning. All students are to make sure that the classrooms stay clean and tidy all the day. The class cabinets are strictly for keeping things for the class. No personal things are kept in the class cabinets. Each class is to provide their own batteries for the clock in the classroom. Class Signs Class signs are put up for your teachers and your parents to easily find you. So please take good care of them. School Toilets For good hygiene and convenience of all, please keep our toilets dry and clean. Always clean them with water after use and wash your hands after that. Do not waste paper. The school can only provide paper in a month. Please use the school toilets as you use the toilet in your own home. After the students use the toilets, they should _ . | [
"keep them wet all the time",
"use paper provided by themselves",
"leave some money for it",
"clean them and wash their hands"
] | null | D | |
mmlu_stem | mmlu_stem_7452 | More and more people are taking their iPads to bed with them to surf the web, check facebook or send e-mails before switching off the light. But researchers are warning that the blue light their screens give off can stop users getting a good night's sleep. That is because this type of light is similar to daylight, convincing the brain that it is still daytime. Blue light prevents the production of a brain chemical called melatonin, which helps us fall asleep. By contrast, light which is more orange or red does not prevent melatonin production, perhaps because our brains recognize it as a cue that the day ends. Scientists have known for years that staring at screens late in the evening can affect sleep ---- they are television screens, computer screens or mobile phone screens. However, because mobiles and iPads are by nature portable ---- not to say addictive ---- more people are taking them into the bedroom. Users also tend to hold them much closer to their eyes than a computer or television screen. Researchers are warning that looking at iPad displays for more than two hours leads to lower natural melatonin levels as the devices give off blue light. They say, "Turning off the devices at night is the final solution. But if you have to use these devices at night, dim the display to cut down irritation of the eyes and limit the time you spend on them before bed." They wrote in the journal Applied Ergonomics that iPad makers should adjust the spectral power distribution of the devices so that they affect the sleep patterns of users less. It is not just a good night's sleep that could be harmed by too much late night screen time. Researchers know that long-term harm to sleep patterns can lead to an increased risk of obesity and even cancers. Blue light prevents iPad users from sleeping well because _ . | [
"it is the same as daylight which keeps people awake",
"it makes the brain more active",
"it is brighter than light that is more orange or red",
"it can help decrease the production of melatonin"
] | null | D | |
mmlu_stem | mmlu_stem_10941 | America's No.1 health problem? A report published by the American Institute of Stress claims the biggest threat to health today is neither cancer nor AIDS. The report says: "It has been estimated that75-90 percent of all visits to primary care physicians are for stress related problems" It is no exaggeration to say that people today are being attacked by stress. According to the National Consumers League, " Work is the top source of stress for adults who have problems and stress in their lives (39%),followed by family (30%).Other sources include health (10%), concern about the economy (9%)and concern about international conflict and terrorism (4%)." However , stress is hardly unique to the United States .A British survey in 2013 estimated that "over half a million individuals in Britain believed in 2012 that they were experiencing work -related stress at a level that was making them ill ." As a result of "work -related stress, depression or anxiety ,"there are "an estimated thirteen and a half million reported lost working days per year in Britain ."\ The picture is no less bleak in mainland Europe .According to the European Agency for Safety and Health at Work , "work-related stress has been shown to affect millions of European Workers across all types of employment sectors ." One survey revealed that there are "about 41 million workers affected by work-related stress each year." What about Asia ? A report issued by a conference held in Tokyo concluded: " Job stress is a common concern among many countries in the world , both developing and industrialized countries ." The report observed that "several countries in East Asia , including China and Korea, have rapidly industrialized and economically grown .These countries now have a lot of concerns on job stress and its harmful effects on workers' health." It is likely that you'll read this information in _ . | [
"Popular Science",
"New York Medical News",
"Daily Health Report",
"Medicine and Healthcare Journal"
] | null | D | |
mmlu_stem | mmlu_stem_16476 | Prana, our beautiful dog whose name means 'breath of life', isn't with us any more. But she brought such joy and love that we still miss her. There are so many wonderful stories about the love in this dog, but my favorite is this one. It was an autumn day in Minnesota, but the weather didn't know the difference between autumn and winter. Unexpectedly, we were hit with a big snow fall for which no one was prepared. We have two apple trees in our backyard. Prana loved apples. When she went outside, she'd take hold of an apple, put it far back in her mouth, and _ the house to save for eating later. The apples had been on the ground and were often dirty so I wasn't always happy that Prana had brought them into the house. Feeling my displeasure, she would turn her head so I wouldn't see her hidden treasure. On the day that it snowed too early in the season, Prana went outside and I watched her from the window. I noticed that she was madly digging holes and brought the apples to the surface so they could be seen above the snow. I wondered why she was doing this. She seemed to be completely busy with some kind of important task to dig up as many apples as possible during her yard time. When I called her back into the house, she had her usual one apple in her mouth. About five minutes later, I looked outside. The yard was completely covered with birds. Prana had dug up all those apples for her bird friends to eat. She knew that they wouldn't have stored enough food to live through such an early winter. The story about the dog happened _ . | [
"in autumn",
"in winter",
"in spring",
"in summer"
] | null | A | |
mmlu_stem | mmlu_stem_16233 | Tom's tenth birthday is on this Sunday. His parents give him a birthday party on Saturday. They help him invite Mike, Simon and two other friends. The party is at Tom's home. Tom's father buys nice food on the morning of Saturday. Mike brings Tom some interesting books. Simon buys a volleyball for Tom. Others give Tom some CDs. They have lunch at twelve thirty in the afternoon. After lunch, the boys and girls sing and dance happily. The party is over at four o'clock in the afternoon. Tom does NOT receive _ from his friends. | [
"books",
"a volleyball",
"CDs",
"pens"
] | null | D | |
mmlu_stem | mmlu_stem_21835 | If a reptile were taken to the iceland it would | [
"have many babies",
"thrive",
"build a home",
"die"
] | null | D | |
mmlu_stem | mmlu_stem_10152 | The Asuncion zoo is looking for a mate for Coco, an endangered hyacinth macaw ,and it is the last known male of his species left in Paraguay. Coco was sent to the zoo eight years ago. A recent DNA test showed that he is male. Zoo worker Celia said To avoid mixing species, the zoo has had to keep him apart from the other macaws, which has left him lonely and bored. "He is quite sociable, although he has only learned to say 'Hello', but when he hears music, he dances" Celia said He has a yellow circle around his eyes that set off the rest of his blue feathers. He is more or less a cousin to Blu , he macaw that starts in the movie, Rio.That species, cyanopsitta-spixii ,is all blue and even more endangered than the hyacinth macaw. Like the bird in the movie, scientists hope to find Coco a mate to- rebuild the species. Because international laws against animal training are now so strict, nobody is willing to lend the zoo a female. "The best solution is to find a female hyacinth macaw in our country. " Celia said, "there are at least two other known hyacinth-macaws but without DNA test, it is impossible to know if they are female, and the owners are not willing to help,because the mating process can take some time and be a little hard on females." Which of the following would be the best title? | [
"Coco, a Rare Macaw-in Asuncion Zoo",
"Asuncion Zoo Is Seeking a Mate for Coco",
"Hyacinth Macaws Are Endangered in Paraguay",
"Coco, the Only Known Male Macaw in Paraguay"
] | null | B | |
mmlu_stem | mmlu_stem_14729 | Jan was a window cleaner. One morning, Jan was in a lift of a high building with his window cleaning tools when the building was on fire. There were five other passengers in the lift. All of a sudden the lift stopped. Although they didn't know what had happened outside, they had only 100 minutes to get out of the building before it would fall into the dust. Soon smoke began coming into the lift. The men knew that something was wrong. They tried to open the door but found a wall in front of them. The wall had the number 15 on it and they knew they were on the 15th floor. But their lift usually didn't stop there, so there was no opening for them to escape. Jan decided they would have to make their own. Knowing that the wall was made of a material that could be cut through, Jan took out his window cleaning tools, and began knocking a hole through the wall. When he felt tired, others helped. Starting with one small hole, they cut through the three-inch-thick wall. Then they kicked hard at the wall. The wall cracked apart. They saw before them a tile wall! Refusing to give up, they knocked a hole through the tile, then made the opening big enough to get through. Surprisingly, the fire-fighters were outside the hole, they took Jan and his partners to the nearest stairs and they ran down the stairs as quickly as possible. By 10:23, Jan and the others ran out of the building. Five minutes later, the building burned down. According to the passage, how many people were in the lift? | [
"5.",
"6.",
"15.",
"We don't know."
] | null | B | |
mmlu_stem | mmlu_stem_19025 | the top layer of soil contains the most nutrients where I | [
"hike",
"wade",
"jog",
"skate"
] | null | A | |
mmlu_stem | mmlu_stem_10666 | Chicken feathers are useful, and not just to a chicken. Some go into pillows, coats and other products. But countless chicken feathers go to waste. In the United States, billions of chickens are produced yearly. Most of their feathers are thrown away. But instead of being buried in land, some feathers could find a future in plastics . One of the products they have developed is a flowerpot . It may look like other flowerpots. But the container breaks down in the earth within one to five years. And as it _ , it naturally becomes nutrient in the soil. The environmentally friendly flowerpot is the work of two researchers. Walter Schmidt is with the Agricultural Research Service, part of the United States Agriculture Department. Masud Huda is with the Horticultural Research Institute, a private organization . Walter Schmidt has been working to find uses for chicken feathers since the 1990s. Progress in 2002 showed that plastic made from feathers could be formed like other plastics. He says feathers are much stronger and last longer than another plant material. "Feathers are stronger. By design, feathers are also more durable . And the other part about it is if feathers were twice as heavy, or half as strong, then birds couldn't fly." He points out that traditional flowerpots made from other plastics can last much longer. But he wonders if there is really a need. He says most flowerpots are never re-used. "Why would you want a plastic that you use for a year to last for two hundred years? It makes no sense. You want to match the product with the use." said Walter Schmidt. Walter Schmidt and Masud Huda are now adding another chicken product to their flowerpots -- chicken waste. The waste will add more nutrients to the soil as the pot breaks down. The scientists say they hope their flowerpot will be on the market in a year or two. What's the advantage of the flowerpots? | [
"They won't last long.",
"They can't break",
"They are environmentally friendly",
"They can be reused"
] | null | C | |
mmlu_stem | mmlu_stem_2129 | The fur of an arctic fox turns from brown to white as winter approaches. This is an example of | [
"camouflage",
"hibernation",
"migration",
"movement"
] | null | A | |
mmlu_stem | mmlu_stem_10613 | The universe looks like a pretty quiet place to live. But the universe is filled with dangerous things, all struggling to be the one to wipe us off the planet. Happily for us, they're all pretty unlikely, but if you wait long enough, one of them is certain to get us. But which one? 1. Death by Asteroid Of all the ways we might meet our untimely death, getting wiped out by an asteroid is the most likely. Why? Because we sit in a universal shooting gallery, with 100 tons of material hitting us every day. The problem, though, occurs every few centuries when something big this way comes. If you could ask a dinosaur, I'd imagine they would tell you to take _ seriously. 2. Death by Exploding Star When a huge star ends its life, it does so with a bang, which sends death spreading across space in the form of high-energy radiation. Many studies show that the bang would have to be closer than about 75 light years to do us any harm. The good news: no stars so close are able to do the deed. 3. Death by Dying Sun The sun is important to us; without it, we'd freeze. But the sun is also middle-aged, already halfway to running out of fuel, expanding into a red giant, and cooking us to a fine crisp. Even long before then, it'll warm up enough to raise our average temperature and cause a runaway greenhouse effect, boiling our oceans. Happily, that's a long time from now. 4. Death by Black Hole Black holes are misunderstood. They don't wander the galaxy looking for tasty snacks in the form of planets and stars; they turn around the Milky Way just like the hundreds of billions of other stars do. But it's possible that one could wander too close to us. If it did, planetary paths would be disturbed, causing the Earth to drop into the sun or be thrown out into deep space. Given that it could be trillions of years or more before even that happens, we don't have to worry too much about black holes. My advice? Go outside, look up, enjoy the sun, the moon, and the stars. They may be there forever as far as any one of us is concerned...and forever is a long, long time. While the author is introducing the ways the universe could wipe out humankind, he is _ us. | [
"warning",
"comforting",
"entertaining",
"ignoring"
] | null | C | |
mmlu_stem | mmlu_stem_9715 | Inprefix = st1 /Kansas City,Missouri, a computer helps fire fighters. The computer, which works very fast, has information about all the 350,000 street addresses in the city. Within two or three seconds after a call is received, the computer provides necessary information for the fire fighters. The information is then sent to them by radio from the computer centre in the City Hall. The exact place of the burning building and its size, type and any other details are clear to them. TheKansas Citycomputer system also has a medical record of each of the city's 900 fire fighters. This kind of information is especially useful when a fire fighter is injured. With the information, doctors at hospital can treat the injured fire fighters more quickly and easily. The fire fighters themselves greatly appreciate the computer's help. They know about possible danger ahead of them and can prepare for it. Many times the computer information helps to save lives and property . Sometimes the lives are those of fire fighters themselves. Mike Horan, a fire fighter captain, says, "I feel as if the computer is watching over me to help me if I get hurt." Which of the following is the best title of the text? | [
"Large Computers in Kansas,Missouri.",
"Computers Help Fire Fighters.",
"Important Information for Fire Fighters.",
"The Speed of the Computers."
] | null | B | |
mmlu_stem | mmlu_stem_16316 | Hi!My name is Maria. Now I am in China. My life is busy but very happy. I like reading, so I often go to the library when I have no classes. Who is my favorite teacher? She is Ms. Green. She often helps me with my writing. I work hard at every subject, but my favorite subject is P.E., because I like playing tennis. In the evening, I am busy doing my homework. I often do my homework for two hours. After that, I play the piano for an hour. Sometimes I take a walk with Dad. On weekends I usually help old people with my friends. What about your life? Share it with us, please. What's Maria's favorite subject? | [
"Tennis",
"Music",
"P.E.",
"Piano"
] | null | C | |
mmlu_stem | mmlu_stem_18793 | Which of the following is a correct food chain? | [
"human -> corn -> cow",
"corn -> human -> cow",
"corn -> cow -> human",
"cow -> human -> corn"
] | null | C | |
mmlu_stem | mmlu_stem_11838 | To what degree can a computer achieve intelligence?The answer to this question may lie in a newly-developed US computer program called Smarter Child and the Internet. If you ran into Smarter Child online, you would be surprised at this kid's huge memory. It can recite many facts. For example, Smarter Child knows every baseball player in every team this season. He knows every word in the dictionary and the weather in every major city areas across the US. However, if you ask Smarter Child other questions, you get strange answers. A question about Smarter Child's age returns, "One year, 11 days, 16 hours, 7 minutes, and 47 seconds!" Asking where he lives gets, "In a clean room in a high-tech building in California." Smarter Child uses the vast information on the World Wide Web as his memory bank. To answer questions about spelling, for instance, Smarter Child goes to American Heritage Dictionary online. For the weather, he visits www.intellicast.com. Some scientists believe that by joining the many systems of the Internet, an artificial being with the combined knowledge of, say, Albert Einstein, Richard Nixon and Britney Spears could be born. However, if Smarter Child wants to think and learn on his own like the boy-computer David in the movie A. I. Artificial Intelligence, he must solve two problems. The first is that computers find it difficult to read web pages because the files are sorted in different ways. That's why programmers need to tell Smarter Child where to look for the weather. It would be a much more difficult task to let him find it himself. Another problem is that while Smarter Child can process information more exactly and faster than any human, he lacks common sense--a basic grounding of knowledge that is obvious to any young child. Which of the following is the best title for the passage? | [
"A New Web Child",
"Smarter Child",
"The Future of Internet",
"Intelligence Development"
] | null | B | |
mmlu_stem | mmlu_stem_16618 | A farmer who lived in a small village had a bad pain in the chest. This never seemed to get any better. The farmer decided that he would go to see a doctor in the nearest town. But as he was a miserly person, he thought he would find out how much he would have to pay the doctor. He was told that a sick person had to pay three pounds for the first visit and one pound for the second visit. The farmer thought about this for a long time, and then he decided to go to the doctor in the town. As he came into the doctor's room, he said, "Good morning, doctor. Here I am again." The doctor was a little surprised. He asked him a few questions, checked his chest and then took the pound which the farmer insisted on giving him. Then the doctor said with a smile, "Well, sir, there's nothing new. Please go on taking the same medicine I gave you the first time you came to see me." How many pounds did a sick person have to pay the doctor in the town for two visits? | [
"Four.",
"Three.",
"One.",
"Two."
] | null | A | |
mmlu_stem | mmlu_stem_16581 | We do the shopping on Sundays . I often go to the supermarket with my mother on Sunday morning in a car . Father likes fruit very much. We buy some red apples for him. Mother likes yellow bananas , but they're green. "Look! The strawberries are very nice, mum. Do you like them?" I say to Mum. "Yes, I like strawberries very much . " Mother buys some for herself. The oranges are very nice. Mother buys some for me . I like orange very much. We need some vegetables . The vegetables in the supermarket are very good . We buy some tomatoes, carrots and broccoli . I don't like broccoli, but my parents like it . I like carrots very much. We buy lots of carrots. After shopping , mother and I have some French fries, milk and ice cream. And then we go back home with the fruit and vegetables . Mother doesn't buy bananas because _ . [:ZXXK] | [
"there are not any bananas",
"the bananas are green",
"She doesn't like bananas",
"I don't like bananas"
] | null | B | |
mmlu_stem | mmlu_stem_7127 | "I drink caffeine to stay awake. It has positive effects on me. I'm healthy, and there's nothing wrong with me," said Sarah Green, a freshman, who consumes many caffeine drinks to stay awake in completing the many tasks in her busy schedule. Caffeine is known to have many positive and negative consequences, and now that there might be an additional positive effect may have been discovered. A study suggests that a skin lotion containing caffeine, which is also found in green tea, may reduce the risk of skin cancer. Two lotion tests were conducted on hairless mice that were exposed to high levels of ultraviolet radiation . As a result, the lotion reduced the number of tumors each mouse developed. Unlike sunscreen , the new lotion is applied after exposure to the ultraviolet rays. Rays from the sun can cause genetic changes in the skin that can lead to skin cancer. Caffeine obstructs this action and causes the diseased cells to kill themselves. "I know that caffeine has been found in certain drinks and it causes increased activity of the nervous system, and increased blood pressure on blood vessels . I don't know of any positive effects of caffeine," health teacher Montego Estes said. Caffeine, found commonly in tea, coffee and soft drinks, provides people with an increase in energy. Half of all American adults consume more than 300 milligrams of caffeine per day. Caffeine is addictive because it uses the same mechanisms as amphetamines , and cocaine and heroin to excite the brain. "This new cream doesn't sound to me as though it would work," junior David Bobbit said, "Caffeine seems to have more negative effects than positive ones." Skin cancer is the most common of all cancers in the US. About one million cases will be diagnosed in the country this year. There will be more than 88,000 new cases of melanoma , the disease's deadliest form of skin cancer. What is the main idea of this passage? | [
"Many Americans like Sarah Green enjoy drinking caffeine.",
"Hairless mice are not easily harmed by ultraviolet radiation.",
"Research shows caffeine may reduce the risk of skin cancer.",
"Americans suffer most from skin cancer among all cancers."
] | null | C | |
mmlu_stem | mmlu_stem_476 | Why do doctors suggest that people get a flu vaccine each year? | [
"Viruses replicate more rapidly over time.",
"Viruses can mutate from year to year.",
"Vaccines are absorbed by the body after a year.",
"Vaccines get stronger over time."
] | null | B | |
mmlu_stem | mmlu_stem_5085 | A lot of people say math is not their strong suit. One New Jersey parent wants to help change that. Laura Overdeck grew up with numbers. She always helped measure ingredients when her mother baked, and she learned about angles from her father. She went on to major in astrophysics in college. Overdeck knew she wanted her own children to be good at math, too. "And when our first child was about two, we just started giving her a math problem every night," Overdeck said. The problem was usually a story, involving animals, cars or candies that let the kid count. "Our third child started, at age two, yelling that he wanted his own math problem because he saw his brother and sister doing it. And we thought, 'Wow, we have a household where math is the popular thing at bedtime,'" Overdeck said. In February, Overdeck launched Bedtime Math, an Internet website where she posts daily puzzles for children. Overdeck is particularly keen to hook children on numbers before they go to school. So why introduce little ones to math so early? Sain Beilock, an expert on performance anxiety, says the more fun and familiar math is early on, the less likely children will feel nervous when they start to learn math in school. "My lab has shown recently that kids as early as first grade report feeling anxious about doing math," Beilock said. "You can hear totally educated adults say, 'You know I'm just not that good at math.' or 'I'm kind of afraid of math.' And that's a totally acceptable thing for a well-educated person to say, but you never hear them say, 'Well, you know, I'm just not that good at reading,'" Overdeck said. She wants children and their parents to become as fluent in numbers as they are in Harry Potter. Beilock's attitude towards Overdeck's idea is _ . | [
"agreeable",
"puzzled",
"anxious",
"critical"
] | null | A | |
mmlu_stem | mmlu_stem_3757 | What happens inside the skull of a soccer player who repeatedly heads a soccer ball? That question motivate a challenging new study of the brains of experienced players that has caused discussion and debate among soccer players, and some anxiety among those of us with soccer-playing children. For the study, researchers at the Albert Einstein College of Medicine in New York selected 34 adults,men and women. All of the volunteers had played soccer since childhood and now competed year-round in adult soccer leagues. Each filled out a detailed questionnaire developed especially for this study to determine how many times they had headed a soccer ball in the previous year, as well as whether they had experienced any known concussions in the past. Then the players completed computerized tests of their memory and other learning skills and had their brains scanned, using a complicated new MRI technique which can find structural changes in the brain that can't be seen during most scans. According to the data they presented at a Radiological Society of North America meeting last month,the researchers found that the players who had headed the ball more than about 1,100 times in the previous 12 months showed significant loss of white matter in parts of their brains involved with memory,attention and the processing of visual information, compared with players who had headed the ball fewer times. This pattern of white matter loss is "similar to those seen in traumatic brain injury" , like that after a serious concussion, the researchers reported,even though only one of these players was reported to have ever experienced a conc ussion. The players who had headed the ball about 1,100 times or more in the past year were also generally worse at recalling lists of words read to them, forgetting or _ the words far more often than players who had headed the ball less. The passage is most probably a _ . | [
"news report",
"research report",
"story for soccer players",
"text for doctors"
] | null | B | |
mmlu_stem | mmlu_stem_9523 | Chinese officials yesterday urged employers to take more measures to protect workers against workplace diseases and injuries. Experts estimate that about 200 million workers face a potential danger of occupational diseases and work-related injuries. The majority of them are farmers-turned-workers who are working in small or medium-sized firms. One of the most serious workplace diseases on the Chinese mainland is pneumoconiosis, a lung disease that is caused by breathing in too much dust of coal, silicon, and cerement. It causes serious breathing difficulties and can be fatal . The disease killed 966 people in the country last year, according to an official report released by the Ministry of Health yesterday. From the early 1950s until the end of last year, 607,570 people were diagnosed with pneumoconiosis. Among the number, 137,481 people died from the disease. Chen Xiaohong, vice minister of health, said the general level of prevention and control of workplace diseases is still quite low in China. "Health authorities at various levels will do more education work in the future to raise employers` awareness that they are the first person responsible for any workplace diseases or accidents," Chen said. He made the remark at a ceremony held by his ministry and other relevant departments under the State Council to award prizes to 56 companies which have done well in protecting workers` health. On the Chinese mainland, more than 16 million companies are engaged in potentially dangerous sectors, such as coal mining, construction, and those that use chemicals, according to the Ministry of Health. Although many companies, especially large foreign-invested and State-owned ones, have done well in protecting workers` health, many employees are still working in dangerous places with poor protection and without any insurance support. At least 90 per cent of Chinese companies are small or medium-sized organizations. Many of these companies, especially private ones based in towns and villages, do not want to spend their money strengthening workplace protection against various diseases and injuries, or buying insurance policies for their employees. According to statistics from Chinese labour and social welfare authorities, there are about 120 million farmers-turned-workers working in Chinese cities. Less than 10 per cent of them have medical or injury insurance and many have no contracts with employers. According to Chinese law on preventing occupational diseases, employers should establish qualified working conditions before opening factories, buy insurance policies for their workers, and provide regular health examinations for labourers. However, according to a survey last year of 74,946 companies that use chemicals or are based in "dangerous sectors," only about 50 per cent offered health tests for workers. From the passage we can see that _ . | [
"200 million workers suffer from workplace diseases and injuries",
"about 23% of Chinese workers once died from pneumoconiosis during about 55 years.",
"less than 12 million farmers-turned-workers have medical or injury insurance.",
"50% of the companies have done well in protecting workers` health."
] | null | B | |
mmlu_stem | mmlu_stem_939 | A sound is heard when you pluck a string on a guitar. What will happen to the sound if the same string is plucked harder? | [
"The volume will stay the same, and the pitch will be higher.",
"The pitch will stay the same, and the volume will be higher.",
"Both the pitch and the volume will be higher.",
"Both the pitch and the volume will stay the same."
] | null | B | |
mmlu_stem | mmlu_stem_1590 | John woke up. It was Tuesday, and he was at home. He was still sleepy, but his alarm clock was ringing and he knew he had to be on time for school. He wished it were Saturday or Sunday. He yawned, got out of bed, and put on his slippers. Then, he walked to the bathroom, where he brushed his teeth and washed his face. Still in his pajamas, he went down to the kitchen. His mother, Sylvia, greeted him with a glass of orange juice and a big bowl of cereal. He was still kind of sleepy, but he drank his juice and ate his cereal. When John was done with his breakfast, he went upstairs and got his school clothes on. Then it was time to catch the bus to school. John hated the bus, because he was quiet and the bus was always loud. Plus there was always some kid who thought it was funny to make gross jokes or say bad words. Today, John was ready for the bus. With the sandwich and potato chips in his lunchbox, he had some cake he had made yesterday. He had used salt to make the cake instead of sugar. He knew it tasted horrible, and he was going to give a piece of cake to the first person who was bad on the bus, and he didn't even care if he got in trouble. His friends Anne, Margaret, and Charlotte were in on it, too. He sat in the house, a little excited, eating an apple and waiting until it was time to leave the house. It was time! He put on his shoes and left. What day did John make the cake? | [
"Saturday",
"Monday",
"Tuesday",
"Sunday"
] | null | B | |
mmlu_stem | mmlu_stem_18362 | Because sulfur cannot be decomposed by simple chemical methods into two or more different substances, it is classified as | [
"an element.",
"a compound.",
"a mixture.",
"a molecule."
] | null | A | |
mmlu_stem | mmlu_stem_17383 | A student sets a block at the top of a wooden ramp. The student pushes the block. As the block slides down the ramp, it slows down and then comes to a stop. What force causes the block to slow down? | [
"the force of gravity",
"the force of friction",
"the force of magnetism",
"the force of the student's push"
] | null | B | |
mmlu_stem | mmlu_stem_8226 | At Institute for the Future, game designer Jane McGonigal creates massive multi-player free online role-playing games (MMORPGs), which focus on social changes and environmental problems. She hopes that players will use their new skills to make the real world better. According to Jane, our addiction to gaming is actually a great thing, so long as we use it properly.Speaking at the TED (Technology/Entertainment/Design)2010 Conference, Jane says that people should devote more time to games to build the skills necessary to make the world better.People who take part in MMORPGs develop specialized skills in problem-solving as a team.So, if gamers are willing to take part in role-playing games based on real-world problems,they will be able to work together to find ways that can be used in the real world. Jane focuses on creating the kinds of video games that enable players to make a difference in their own lives and the lives of those around them.In 2007, she helped create a video game called A World Without Oil, in which 1, 800 players tried to find new ways to transport themselves in a world without oil.Even after completing the game, the players focused on the problem and its possible solutions.Her next game, Evoke, takes an even more practical way.Game players are mainly young people in Africa.They will learn to create a business that will help stop problems such as poverty and AIDS on a local level.By the end of the game, players will be guided by experts on how to start their own businesses. "We can make any future we imagine and we can play any games we want," she said at the TED Conference."So let the world-changing games begin." Which of the following is true about MMORPGs? _ | [
"Role-playing games are real-world problems.",
"They take too much of gamers' spare time.",
"The gamers play different roles in the games.",
"They cost gamers a lot of money to play."
] | null | C | |
mmlu_stem | mmlu_stem_6958 | A schoolboy, who has been unable to play sports, has found the perfect entertainment--snowboarding. Thomas Pettigrew is enjoying himself by performing difficult actions at freestyle events. The youngster can't join in PE lessons at school, because he suffers from a rare condition, which means his body dangerously overheats. This makes it difficult for his body to cool down naturally. But the ice-cool temperatures on the mountains mean Thomas can slide down the slopes freely. His father Richard came up with the idea of taking Thomas snowboarding in March, 2010. Now while other children look forward to playing outside in the sunshine, Thomas is applying his new activity at the Snow Zone in Castleford, in temperatures of about -5degC. Mr. Pettigrew said, "When Thomas tries most sports, he has to stop when he gets too hot but that never happens with snowboarding. I was surprised at how good he was when he started. He now goes every week for three or four hours. He's been so enthusiastic about his snowboarding that he's even persuaded me to have a go, so we can enjoy it together." Thomas's parents have spent the past 10 years watching the schoolboy for any signs of overheating, only taking him on holiday in the cooler months. "He has no energy and no interest in doing anything if he overheats and we do whatever it takes to cool his temperature, such as putting him in the car with the air conditioner working or running cold baths." Aiden Harington, head of the ski school at Snow Zone, said, "Snow sports are a great way for anyone to keep fit, but seem to be particularly beneficial to Thomas as he is able to make sure he stays cool. Thomas does very well in snowboarding, and he can now perform plenty of freestyle actions. I'm sure that he will continue to progress in the coming months, and hopefully take part in some of our freestyle events." Thomas's parents need to cool down his body once he is _ . | [
"nervous",
"excited",
"spiritless",
"sleepy"
] | null | C | |
mmlu_stem | mmlu_stem_3059 | The leftovers in the fridge smelled a little unusual, but you ate them. You were so hungry that you didn't even heat them up. Later, you started to feel sick. Powerful waves of pain rumbled through your stomach. They went away, but not for long, then you even threw up. That sounds like the case of food poisoning. No one put poison in your food, but bacteria probably grew in the food in the fridge and those bacteria made you sick. Food poisoning can be mild and last just a short time or can be more serious. Food poisoning comes from eating foods that contain germs like bad bacteria, which are poisonous substances. Bacteria are all around us, so mild cases of food poisoning are common. You may have had mild food poisoning with diarrhea and an upset stomach --- but your mom or dad just called it a stomach bug or stomach virus. You might think the solution is to get rid of all the bacteria, but it isn't possible and you wouldn't want to do it, even if you could. Bacteria are all around us, including food, and sometimes they can be good for you. It's confusing, but one thing is for sure ---- You can, however, learn how to avoid those bad germs in food. Foods from animals, raw foods, and unwashed vegetables all can contain germs that cause food poisoning. The most likely source is food from animals, eggs, milk, and shellfish. To avoid food poisoning, people need to prepare, cook, and store foods properly. Which is the best title for the passage? | [
"Food poisoning.",
"What is food poisoning?",
"Which germs are to blame?",
"You are what you eat."
] | null | A | |
mmlu_stem | mmlu_stem_19176 | Birds eat nuts, but sometimes they eat | [
"wolves",
"bugs",
"dogs",
"cats"
] | null | B | |
mmlu_stem | mmlu_stem_7679 | When Babbage was working atprefix = st1 /Cambridge, a new idea occurred to him. He wanted to construct a calculating machine to work out the solutions to maths problems not only with correctness but also with a speed beyond the power of any human mind. His machine could solve problems involving long rows of figures in one continuous operation . In 1822 Babbage exhibited his invention and won a prize from the government. After that, he immediately started to work on a larger machine designed to solve more difficult problems. Although he received some money left by his father, the money was not enough to support his design. He wrote to the government about his plan and was givenPS2500 to start with, a sum worth much more in those days than it is now. Babbage continued his work inLondonfor four years. Then his health broke down, and he had to take a long holiday abroad. When he returned toLondonin 1828, he was at the end of his resources. Many bills remained unpaid. His chief assistant and co-workers quarreled with him and left with many expensive tools. For one year no work was done. During this period, Babbage, whose mind was always active, suddenly thought of a completely new idea for the machine. He rushed to meet the government officials to explain his new idea. But this time, they were unwilling to help him. For eight years, they refused to say whether they wanted the machine or not, and their final answer was "No." From 1828 to 1839, Babbage held the position of professor atCambridgevery successfully. But his greatest work was the unfinished calculating machine which stood covered in dust in his house. It was the beginning of the modern computer. Babage explained his new idea to the government officials, expecting that _ . | [
"they would agree to his plan",
"they would pay for his new idea",
"they would support him with money",
"they would exhibit his new design"
] | null | C | |
mmlu_stem | mmlu_stem_11640 | On May 23,1989, Stefania Follini came out from a cave at Carlsbad, New Mexico. She hadn't seen the sun for eighteen and a half weeks. Stefania was in a research program, and the scientists in the program were studying body rhythms . In this experiment Stefania had spent 130 days in a cave, 30 feet in depth. During her time in the cave, Stefania had been completely alone except for two white mice. Her living place had been very comfortable, but there had been nothing to fell her the time. She'd had no clock or watches, no television or radio. There had been no natural light and the temperature had always been kept at 21degC. The results were very interesting. Stefania had been in the cave for over four months, but she thought she had been there for only two. Her body clock had changed. She hadn't kept to a 24-hour day. She had stayed awake for 20-25 hours and then had slept for 10 hours. She had eaten fewer meals and had lost 17lbs in weight as a result! She had also become rather depressed . How had she spent her time in the cave? As part of the experiment she'd done some physical and mental tests. She'd recorded her daily activities and the results of the tests on a computer. This computer had been specially programmed for the project. Whenever she was free, she'd played cards, read books and listened to music. She'd also learned French from tapes. The experiment showed that our body clocks are affected by light and temperature, For example, the pattern of day and night makes us wake up and go to sleep. However, People are affected in different ways. Some people wake up naturally at 5:00 am, but others don't start to wake up till 9:00 or 10;00 am. This affects the whole daily rhythm. As a result, the early risers are at their best in the late morning. The late risers, on the other hand, are tired during the day and only come to life in the afternoon or evening! Where does the text probably come from? | [
"A novel",
"A news story",
"A pet magazine",
"A travel guide"
] | null | B | |
mmlu_stem | mmlu_stem_6483 | Hamsters are lovely small animals which are similar to mice, and some people like to keep them as pets. They need to eat a balanced diet, or they can become very sick. That's why hamsters should be fed healthy foods. Most pet stores sell hamster mix. This is a combination of foods that are just right for hamsters. Some hamsters are picky eaters. They don't eat anything they don't like, so you have to find a hamster mix that your hamster will like. Most hamsters only eat a few tablespoons a day. You should feed them at the same time every day, or you can just keep your hamster's bowl full. Remember to clean the bowl at least once a week. Hamsters also drink a lot of water, so be sure to keep the water supply full and fresh. Just like people, hamsters like treats. Besides the hamster mix, you can sometimes feed your hamster seeds, nuts, and some other people food. You should never feed your hamster anything unless you are sure that it is safe for hamsters. Feed your hamster carefully, and always take good care of your pet! If hamsters don't have a balanced diet, they will _ . | [
"become sick",
"drink water",
"store food",
"feel fresh"
] | null | A | |
mmlu_stem | mmlu_stem_15109 | A smile will tell people around you that you are a kind and friendly person. However,many people don't smile because they think they ugly teeth. For example, one of my classmates, Mile, doesn't have very nice teeth,so thatis why he seldom opens his mouth.he even says that he has lost cofidence because of his teeth.So it is very important for us to look after our teeth. In fact, a lot of people have this problem.Some people inherit teeth problems from their parents,while others'teeth are damaged because of bad habits,like heavy smoking,eating too much sugar or not brush-ing teeth often.If your teeth are in bad shape, you should see a dentist and ask for help. They can help improve your teeth and tell you how to take care of then. Smiling can help you to feel more confident and make other people think of you as a more friendly person. If you want to keep healthy,you should not only smile but also laugh. An Indian doctor called Kataria said that young children should laugh about 300 times a day, wile adults should laugh between 7 and 15 times a day. So please take this chance to smile and laugh now! ,. If you want to keep healthy, you had better _ . | [
"not smile often",
"laugh all the time",
"neiter smile nor laugh",
"smile and even laugh often"
] | null | D | |
mmlu_stem | mmlu_stem_2874 | In 1977, Irene Pepperberg of Harvard University began studying what was on another creature's mind by talking to it. Her first experiments began with Alex. Alex was a one-year-old African grey parrot and Irene taught him to produce the sounds of the English language. "I thought if he learned to communicate, I could ask him questions about how he sees the world." At the time, most scientists didn't believe animals had any thoughts. They thought animals were more like robots but didn't have the ability to think or feel. Of course, if you own a pet you probably disagree. But it is the job of a scientist to prove this and nowadays more scientists accept that animals can think for themselves. "That's why I started my studies with Alex," Irene said, "Some people actually called me crazy for trying this." Nowadays, we have more and more evidence that animals have all sorts of mental abilities. Sheep can recognize faces. Chimpanzees use a variety of tools and even use weapons to hunt. And Alex the parrot became a very good talker. Thirty years after the Alex studies began. Irene was still giving him English lessons up until his recent death. For example, if Alex was hungry he could say "want grape". Alex could count to six and was learning the sounds for seven and eight. "He has to hear the words over and over before he can correctly say them." Irene said, after pronouncing "seven" for Alex a few times in a row. Alex could also tell the difference between colors, shapes, sizes, and materials (e.g. wood and metal). Before he finally died, Alex managed to say "seven". Another famous pet that proved some animals have greater mental skills was a dog called Rico. He appeared on a German TV game show in 2011. Rico knew the names of 200 different toys and easily learned the names of new ones. When Rico became famous, many other dog owners wanted to show how clever their pets were. Another dog called Betsy could understand 300 words. One theory for dogs' ability to learn a language is that they have ben close companions to humans for many centuries and so their ability to understand us is constantly evolving . While animals can't do what humans do yet, some scientists believe that examples like Alex and Rico prove that evolution develops intelligence, as well as physical appearance. The article concludes that _ . | [
"our pets understand what we say",
"dogs may speak to humans one day",
"humans are related to chimpanzees",
"mental ability can evolve in animals"
] | null | D | |
mmlu_stem | mmlu_stem_13235 | Dick is not old, but he does not have much hair. His wife Emma has thick, beautiful and black hair. They have a son. His name is Peter, and he is five years old. Today Dick is reading a book in his study. Peter looks at his father for a long time and then asks his mother, "Why does Papa have so little hair, Mama?" Emma laughs and says, "He has little hair becauseThe food looks good but _ bad. he thinks a lot. He's a very clever man." Peter looks at his mother's thick hair for a few seconds and then laughs, "Then I know why you have so much hair." Emma has _ hair. | [
"short",
"no",
"thick",
"long"
] | null | C | |
mmlu_stem | mmlu_stem_20947 | Which of the following relationships is true? | [
"Play-Doh can scratch diamond, therefore it is softer",
"Diamond can scratch Play-Doh, therefore Play-Doh is harder",
"Diamond can scratch Play-Doh, therefore diamond is harder",
"Play-Doh can scratch diamond, therefore it is harder"
] | null | C | |
mmlu_stem | mmlu_stem_9821 | Have you ever heard that we humans use only ten percent of our brains? This opinion holds a certain appeal because if it were true, then we could instantly become ten times more intelligent just by firing up that sleepy majority of the brain! The idea that we use only a small part of the brain dates back to animal experiments in the 19th century. When scientists stimulated a specific part of the brain, the animal moved its leg or tail. If a tiny part of the brain could do something so great, what was the use of the rest of the brain? Some scientists assumed that large parts of the brain were simply useless. Then, in the early 20th century, scientists observed that stimulating certain parts of the brain had no physical effects. They named these seemingly useless parts of the brain the "silent cortex." Today we know that in humans, much of the "silent cortex" is actually devoted to complex activities like language, learning, and imagining. Brain scans have shown that different parts of the brain become much more active as we shift our attention and focus, but even as we sleep, many areas of the brain are extremely active. Would you be smarter if your entire brain constantly worked to maximum capacity ? Interestingly enough, the opposite is probably true. The less brain activity you need to perform a given task, the more the brain as a whole is able to do. Silent cortex has proved to be _ . | [
"sensitive to stimulation",
"useful in complex activities",
"responsible for physical reaction",
"more active than the other parts of the brain"
] | null | B | |
mmlu_stem | mmlu_stem_8292 | It was only a few weeks after my surgery, and I went to Dr. Belt's office for a checkup. It was just after my first chemotherapy treatment. My scar was still very tender. My arm was numb underneath. As usual, I was taken to an examination room to have my blood drawn, again --a terrifying process for me, since I'm so frightened of needles. I lay down on the examining table. Ramona entered the room. Her warm smile was familiar, and stood out in contrast to my fears. She knew about my fear of needles, and she kindly hid the equipment under a magazine. As we opened the blouse, the fresh scar on my chest could be seen. She said, "How is your scar healing?" I said, "I think pretty well. I wash around it gently each day." The memory of the shower water hitting my numb chest flashed across my face. She gently reached over and ran her hand across the scar, examining the smoothness of the healing skin and looking for any irregularities. I began to cry gently and quietly. She brought her warm eyes to mine and said, "You haven't touched it yet, have you?" And I said, "No." So this wonderful, warm woman laid the hand on my chest and she gently held it there. For a long time, I continued to cry quietly. In soft tones she said, "This is part of your body. This is you. It's okay to touch it." But I couldn't. So she touched it for me. The scar. The healing wound. And beneath it, she touched my heart. Then Ramona said, "I'll hold your hand while you touch it." So she placed her hand next to mine, and we both were quiet. That was the gift that Ramona gave me. Ramona hid the equipment under a magazine to _ . | [
"cheer me up",
"rid my fear",
"make me amused",
"tease me"
] | null | B | |
mmlu_stem | mmlu_stem_13352 | Jack's mother is ill. His father goes to New York and the boy has to look after her. He gets up early this morning, cooks breakfast for his sister and gives his mother some medicine and water and then goes to school. On the way to school, Jack meets Bob, one of his friends. Bob asks, "Are you late this morning, too?" "Yes, I am." "I'm sure Mr. Brown will be angry at us," says Bob, "We can't go to school." "Where are we going, then?" "To the zoo. There are many monkeys in it. We'll have a good time there." "We can't do that," says Jack, "or we'll fall behind our classmates. Mr. Brown is good. He wants us to be good, too." Bob thinks Jack is right and they go to school. Jack is late for school because _ . | [
"he gets up late.",
"he goes to the zoo.",
"he meets Bob.",
"he looks after his mother and sister."
] | null | D | |
mmlu_stem | mmlu_stem_17273 | Which of the following is found in all living organisms? | [
"cell",
"organ",
"organ system",
"tissue"
] | null | A | |
mmlu_stem | mmlu_stem_7997 | It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can't fix the damage. Sometimes they are afraid to try something to help because it is dangerous to work on the brain. The doctors might make the person worse if he operates on the brain. Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain. Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, and then he operated on them. He made the monkeys' blood go through a machine. The machine cooled the blood. Then the machine sent the blood back to the monkeys' brains. When the brain's temperature was 10degC, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them. The biggest difficulty in operating on the damaged brain is that _ . | [
"the time is too short for doctors",
"the patients are often too nervous",
"the damage is extremely hard to fix",
"the blood-cooling machine might break down"
] | null | A | |
mmlu_stem | mmlu_stem_13751 | Long ago, there was a little elephant. He left home and played in the forest alone. He stayed outside for many days and became dirty because he could not wash his back. All the other animals didn't play with him because he was dirty. The elephant sat under a tree. He started to cry. He cried for two days. But nobody could see him there. So he went back home and asked for help. His mother told him," You have a long trunk . It can help you wash your back." He and his mother went to the river and his mother taught him how to use the trunk to clean his back with water. All the other animals came over to him and said, "You are so clean now. Do you want to play with us?" The elephant was so happy and said, "Yes." Who taught the little elephant how to wash his back? | [
"His father.",
"A bird.",
"Himself.",
"His mother."
] | null | D | |
mmlu_stem | mmlu_stem_19473 | Over the years, the desert rat has evolved traits that help it live with low supplies of water, what is this an example of? | [
"Acquired statistics",
"Acquired interests",
"Acquired characteristics",
"Acquired heuristics"
] | null | C | |
mmlu_stem | mmlu_stem_9785 | "Any time! Any where! Decades ago there was no such thing" - "Communication". Then, September 7th 1987, the global system for mobile communication or GSM was born. And international agreements that laid out the standards, regulations and practices gave rise to a global mobile phone industry. To be honest, the world's first mobiles were not so attractive and the range of effectiveness wasn't very good. But they became a must-have among those wealthy people who could afford that. However, by advantage of GSM which has many different elements to it, we can all enjoy the ability to go around the world in 217 countries, land in that country and know that a phone would work. There are other cell phone systems using different technology in the world. The majority of the United States and parts of South America have been using something called CDMA which is very rare in Europe. In some Asian countries like China, GSM and CDMA both exist at the same time. But the GSM Association claims 85% of the global mobile phone market. They estimated there are now about 2.5 billion different users who make more than 7 trillion minutes of calls everyday, and that's not all. 20 years later, the mobile phone is so much more than just a phone. You can use it to send text messages, take pictures, show video, even surf the internet. "The phone itself is involved from just being a communication tool, to be a tool for round-the-clock connectivity, you can not live without it even in a minute." Mobile consultant Nick Lane also points out with so many customized styles and features, your mobile phone will become a symbol of you. Where will the global mobile phone industry be in another 20 years? Certainly, there will be more connections than better coverage. As for where else technology will take us, one can only imagine. By pointing out "your mobile phone will become a symbol of you", what does Nick Lane want to tell us about the mobile phone in the future? | [
"You can have a mobile phone with the unique look and functions as you like.",
"Others can find us without any difficulties if we carry our mobile phone.",
"The mobile phone can be used as a permit when you enter some places.",
"The mobile phone we carry can show others how wealthy we are."
] | null | A |
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