dataset string | id string | question string | choices list | rationale string | answer string | subject string |
|---|---|---|---|---|---|---|
mmlu_stem | mmlu_stem_20585 | Which of these animals might seek out the same type of food that a rabbit would? | [
"a lion",
"a cow",
"a wolf",
"a preying mantis"
] | null | B | |
mmlu_stem | mmlu_stem_10484 | A blocked airway can kill someone in three to four minutes, but it can take more than eight minutes for an ambulance to arrive. So a simple procedure such as opening someone's airway can save their life while they're waiting for emergency medical help. This means you're more likely to give first aid to someone you know than a stranger. There are many misconceptions surrounding first aid. Below are the 'most popular' ones with details of what you should do. You should put butter or cream on a burn. The only thing you should put on a burn is cold water - keep the butter for cooking. Put the affected area under cold running water for at least ten minutes. The best way to treat bleeding is to put the wound under a tap. If you put a bleeding wound under a tap you wash away the body's clotting agents and make it bleed more. Instead put pressure on the wound with whatever is available to stop or slow down the flow of blood. As soon as possible call 999. Keep pressure on the wound until help arrives. Nosebleeds are best treated by putting the head back. If you put the head back during a nosebleed, all the blood goes down the back of the airway. Instead advise them to tilt their head forwards and ask the person to pinch the end of their nose and breathe through their mouth. You need lots of training to do first aid. You don't - what you mostly need is common sense. You can learn enough first aid in a few minutes to save someone's life - whether it's from a book, attending a course or watching videos online. Remember: anyone can save a life Which of the following statement is RIGHT? | [
"When a person's nose bleed, please put the head back.",
"You can learn first aid in quickly in different ways.",
"When a person is burnt, crap the burn until help arrives.",
"Not everyone can do first aid to save a life."
] | null | B | |
mmlu_stem | mmlu_stem_20392 | What will happen to gas once heated? | [
"melting",
"freezing",
"ascension",
"cooling"
] | null | C | |
mmlu_stem | mmlu_stem_11221 | The green turtle is listed as endangered by the International Union for the Conservation of Nature. Under the U.S. Endangered Species Act of 1973, the green turtle was listed as threatened except for the breeding populations in Florida and on the Pacific coast of Mexico, where it is listed as endangered. Green turtles continue to be caught for money by humans, and the destruction and loss of nesting and foraging sites is a serious problem. Humans have already caused the decrease of large green turtle populations, including those that once nested in Bermuda and Cayman Islands. The situation of green turtle populations is difficult to determine because of our lack of knowledge about their life cycles. The number of nests in Florida appears to be increasing, but we don't know whether this is due to an increase in the number of nests or because we have started to monitor nesting beaches more closely. The green turtle is the largest hardshelled sea turtle. Adults of this species commonly reach 100 cm in length and 150 kg in mass. The average size of a female nesting in Florida is 101.5 cm straight in length, with an average body mass of 136 kg. Growth rates of green turtles have not been measured under natural conditions. Green turtles grow slowly. In the southern Bahamas, green turtles grow from 30 to 75 cm in 17 years, and according to Bjorndal and Bolten, growth rates decrease with increasing length. Growth rates measured in green turtles from Florida and Puerto Rico fall within the range of growth rates measured in the southern Bahamas. Based on growth rate studies of wild green turtles, the researchers Balazs, Frazer and Ehrhart estimate the age of sexual maturity can range anywhere from 20 to 50 years. Why is it hard for us to know the number of green turtles? | [
"Because it is difficult for us to be close to them.",
"Because we have limited knowledge about them.",
"Because we haven't measured their growth rates.",
"Because they grow too slowly."
] | null | B | |
mmlu_stem | mmlu_stem_21285 | During cellar respiration I might find myself with | [
"candy",
"natural face water",
"magic",
"time travel powers"
] | null | B | |
mmlu_stem | mmlu_stem_8816 | Farm-raised pigs are dirty, smelly animals that get no respect. They're also an environmental hazard. Their manure contains phosphorus ,which, when it rains, runs off into lakes and rivers, consuming oxygen, killing fish, stimulating algae overgrowth and emitting greenhouse gases. Doing away with the pig is not an option. Pigs provide more dietary protein, more cheaply, to more people than any other animal. Northern Europe still maintains the highest pig-to-human ratio in the world (2-1 in Denmark), but East Asia is catching up. During the 1990s, pork production doubled in Vietnam and grew by 70 percent in China--along densely populated coastlines, pig density exceeds 100 animals per square kilometer. The resulting pollution is "threatening fragile coastal marine habitats including mangroves ,coral reefs and sea grasses ,"according to a report released in February by the Food and Agriculture Organization of the United Nations. As it turns out, there is a solution to the pig problem, but it requires a change of mind-set among environmentalists and the public. Two Canadian scientists have created a pig whose manure doesn't contain very much phosphorus at all. If this variety of pig were adopted widely, It could greatly reduce a major source of pollution. But the Enviropig, as they call it, is the product of genetic modification--which is anathema to many Westerners. The Enviropig is one of many new technologies that are putting environmentalists and organic-food supporters in _ : should they remain categorically opposed to genetically modified (GM)foods even at the expense of the environment? Elsewhere, trees grown for paper could be made amenable to much more efficient processing, reducing both energy usage and toxic chemical bleach in waste water from paper mills. The most significant GM applications will be ones that help lessen the problem of agriculture , which accounts for 38percent of the world's landmass and is crowding out natural ecosystems and species habitats. Chances are, farmers will continue to grow their polluting organic pork, their allergenic organic soy and their neurotoxin sprayed organic apples. Worse still, they will make sure that no one else gets a choice in the matter of improving the conditions of life on earth--unless, that is, others rise up and demand an alternative. The negative influence brought by the traditional agriculture is _ -. | [
"more living space occupation",
"more crop improvement",
"more food production",
"more chemical application"
] | null | A | |
mmlu_stem | mmlu_stem_9086 | At a few minutes past five, Dave noted that the blanket of darkness was lifting. He was just able to make out the heavier masses that eventually appeared as the familiar trees that lined the road at the base of the hill. The upper reaches of the sky showed lighter shades of gray. Dave got out of bed quietly and dressed quickly. He mixed a spoonful of instant chocolate into a glass of cold water, and his impatience forced him to finish the drink in gulps. As he walked down toward the lake, Dave paused to reach for the fishing pole and gear box on the bench where he had left them the night before. By the time he reached the small boat, a thick white mist had spread over the surface of the water. He stepped into the boat, sat down, and rowed out of the weed beds that lined the edge of the shore. The outer fringe of the lake disappeared as the boat moved forward noiselessly. All he could see was the enveloping whiteness. He could not tell where the boat and the surrounding air met the surface of the lake. Dave rowed steadily ahead, relying on a mental picture of the surroundings. Then the mist began to rise, slowly. _ soon rested inches above the still surface of the lake. The heavy silence was now being broken by the fish breaking through the surface as they leaped out of the water for low-flying insects. The magic time had arrived. Dave raised his pole. Dawn was broken. He was excited with expectancy. Dave got up early in the morning to _ . | [
"enjoy the scene of the lake",
"seek adventure at the lake",
"go fishing in the lake",
"take a walk by the lake"
] | null | C | |
mmlu_stem | mmlu_stem_1723 | Sam's granddad was going to take Sam and his two brothers, James and Evan on vacation. They could choose to go to the lake or the beach. If they chose the lake, they would get to go on their granddad's boat. If they chose the beach, there would be sand to dig in. All three boys began to clap and cheer for the beach! The boys left their house in their granddad's van to drive to the beach. They drove by their school on the way. The boys were glad to be out for the summer. On the road, the boys played a game. Whoever counted the most big trucks would be the winner. James counted one hundred and five trucks. This was more than Sam or Evan counted. Evan pointed out the window at a man dressed all in black riding a black motorcycle. The man had a long beard. When they got to the beach, their granddad told them to put on sunscreen so they would not get sun burned. The boys grabbed their pails and shovels and ran down on to the sand near the water. Their granddad brought a chair to sit on and a large umbrella to give him shade. He also brought some noodles for the boys to float on if they went into the water. Sam found a piece of wood washed up on the beach. He used it make a bridge over large hole that the boys had dug. Who won the counting trucks game? | [
"Sam.",
"James.",
"Their granddad.",
"Evan."
] | null | B | |
mmlu_stem | mmlu_stem_3284 | "Mommy! Call I go and play outside with Danny? Please? I promise l will only play in the shade!" Kelly said. What hurt her mother was only being able to stand aside when her daughter needed her most."Kelly...I'm really sorry.You can't go.I'm too concerned about you. You might accidentally go in the sun,which means we have to get you to hospital again."Kelly was allergic to the sun.The doctor said it was incurable. Kelly looked outside where her brother Danny was playing.Why did she have to be allergic to the sun? Why? Kelly's mother closed her eyes and she pointed upstairs where Kelly's bed was."Go to bed."she said.Kelly had tears in her eyes.She forced her legs up the stairs and buried her face in her pillow.She wanted Danny to come back , for he could tell her stories about birds and squirrels.She waited,and soon he did come and told her about a blue bird he had seen.Kelly often wondered what a bird looked like.She was really curious about the birds in the yard.Maybe she could find out herself someday. The next day, Danny entered Kelly's room again to tell her what he had seen.She wasn't there.He called again and again but no one replied.He searched anxiously around and saw a body.His eyes widened.It couldn't be.Was it what he thought it was? Was it...Kelly? With shaking hands,Danny turned over the body.He screamed.It was Kelly.Her skin was swollen and had ugly rashes all over.She was holding a pencil in her right hand.And in her left hand was an almost finished picture of a bird , below which he found some words which read:"I finally get to see you.I will always remember you and love your nature no matter what." Where did Danny possibly find Kelly the next day? | [
"In the yard.",
"In the kitchen.",
"In the basement.",
"In the living room."
] | null | A | |
mmlu_stem | mmlu_stem_2920 | Maybe you don't think animals have certain mental powers which human beings do not have. But the truth is that some of them have instincts, and besides this, I am sure they can feel certain things we humans cannot. A personal experience showed me this. Some years ago, I had a dog named Howard. From the time when he was a puppy, he was timid, so we named him Howard, sounding like "coward"! He was especially afraid of thunderstorms. At the first flash of lightning or crash of thunder, he would run whining into his house and hide under a table. I often went for a walk with Howard. Once, as we were walking along a road, it began to rain. I quickly ran to a bus stop for shelter. The bus stop had a roof supported by metal poles. Soon after I had got there, Howard caught my trousers in his teeth and tried to pull me away. At first I was puzzled and a little angry at his behavior. But I decided to humor him and walked away from the shelter into the rain and started to go home. When I was about two hundred metres from the shelter, there came a flash of lightning and soon after, there was thunder which nearly deafened me. Howard stopped walking and began whining. Thinking he was afraid, I bent to pick him up. As I straightened up, I glanced at the bus shelter we had just left. I was shocked to see that two of the poles were bent and the roof was lying on the ground, broken. The shelter had been struck by the bolt of lightning! What can be inferred about the bus shelter from the passage? | [
"It was about 200 meters from the author's home.",
"It was destroyed in a rainy day.",
"Its roof was supported by wood poles.",
"It could produce blinding flash of lightning."
] | null | B | |
mmlu_stem | mmlu_stem_15602 | We've talked about snails and their slow move. But much of the time snails don't move at all. They are in their shells --sleeping. Hot sun will dry out a snail's body. So at the least sign of hot sun, a snail draws its body into his shell. A snail will die in a heavy rain. So when it rains, a snail does the same thing, too. A snail can sleep for as long as it needs to. It spends all the winter months in its shell, asleep. In the spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry, the snail looks for food. Its eyes, at the end of the top feelers, are very weak. But its sense of smell is very strong. It helps the snail to find food and the new greens. A snail's mouth is no bigger than the point of a pin. Yet it has 256,000 teeth! The teeth are very small, and you can't see them. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out its teeth, it will grow new ones. From the story, we know _ . | [
"a snail's shell is very thin",
"a snail can't see well",
"a snail's nose is quite short",
"a snail's body changes in different seasons"
] | null | B | |
mmlu_stem | mmlu_stem_18388 | Which two body systems work together to transport oxygen to the cells? | [
"skeletal and respiratory",
"digestive and respiratory",
"respiratory and circulatory",
"respiratory and reproductive"
] | null | C | |
mmlu_stem | mmlu_stem_14549 | Computers are useful machines. They can help people a lot in their daily life. For example, they can help people to save much time to do more work, and they can help people to work out many problems they can't do easily. Our country asks everyone to learn to use computers before the twenty-first century, except the old people. Today more and more families own computers. Parents buy computers for their children. They hope computers can help them improve their studies in school. However, many of their children use computers to play games, to watch videos or to sing. The teachers and parents complain that computers can not help children to study but make them fall behind. So computers are locked in boxes by parents. In some other countries, even some scientists also hate computers. They say computers let millions of people lose their jobs or bring them a lot of trouble. Will computers really bring trouble to people or can they bring people happiness? It will be decided by today's students themselves! Why do we say the computer is a useful machine? Because _ . | [
"our country asks us to learn it",
"it can help us a lot",
"we can use it to play games",
"it can help us to find jobs"
] | null | B | |
mmlu_stem | mmlu_stem_16483 | Mr. White was over 80 years old, but he looked younger than his age. He played Tai Chi in the park every day, so he was very healthy. It was 11:30. It was time for him to walk home. He usually got home thirty minutes later. One day, Mr. White didn't get home until 12:30. His family worried about him. After a short while, a police car stopped in front of their house. What happened? "The old man was lost and he called us for help," the policeman said. When the policeman left, Mr. White's daughter asked her father, "Dad, you go to the park every day. How can you be lost?" "I'm not lost at all. I'm just tired. I don't want to go home on foot," answered Mr. White with a smile. Mr. White usually gets home at _ . | [
"11:00",
"11:30",
"12:00",
"12:30"
] | null | C | |
mmlu_stem | mmlu_stem_15674 | Read the instructions of the medicine before you take your choices. Adults : 2 tablespoonfuls Children: according to age 10----14 years 4 teaspoonfuls 5----10years 2 teaspoonfuls 3----6 years I teaspoonful Repeat above doses every 1/2 hour to 1 hour if needed until 8 dose are taken. If you do not get better within two days, see a doctor. SHAKE WELLBEFORE USING. In this passage 'choice" means _ . | [
"not eating",
"decision",
"choose",
"eating"
] | null | B | |
mmlu_stem | mmlu_stem_4968 | SHANGHAI - Health experts in Shanghai are calling for more protection for young children as the latest research shows about half of the youngsters are suffering from secondhand smoke. About 45 percent of children suffer passive smoking in families, 50 percent in public places, and almost 6 percent on public transportation, shows a research released by the Shanghai Children's Medical Center on Tuesday. "Not only adults but also children and newborn babies are at risk for the adverse effects of passive smoking," said Tang Jingyan, a doctor at the Shanghai Children's Medical Center. "Actually, those young children whose bodies are still growing and developing are more sensitive to the effects of secondhand smoke." Research has shown that children who are exposed to secondhand smoke will suffer from more colds, coughs and sore throats, and they are more likely to suffer from bronchitis, pneumonia and will have a higher risk of developing cancer. Doctors even suggested that children suffering passive smoking are more likely to have behavioral problems and may not develop mentally as quickly as their peers. Other research by the Shanghai Children's Medical Center has found that more than 80 percent of child patients in the center live in a smoke-filled household, where one or both parents smoke. "Though doctors have stressed the harm of passive smoking over and over, it is still hard to reach a totally 'smoke free' home," said a pediatrician named Zhang Yiwen, noting that parents are often tempted to smoke even though they have learned the harmful effects of secondhand smoke. China has 540 million people suffering from passive smoke, 180 million of them younger than 15.The age of smokers is also getting lower, earlier reports said. "There are more young smokers than before.You can see young people wearing a school uniform and carrying a schoolbag light a cigarette on the street.Some of them are even female students," said Jing Xingming, a professor of children's developmental behavior at the center. "Children like to imitate adults, especially their parents.If parents often smoke at home, it is very likely children will develop a smoking habit, which can cause a vicious circle," Jin said. Reports from the Ministry of Health said China has about 350 million smokers, of whom 15 million are underage smokers.Also, around 40 million of the country's 130 million children aged between 13 and 18 had tried smoking, and 15 million had become addicted to tobacco. What kind of the youngsters most possibly develop a habit of smoking? | [
"Children of non-smoking mothers.",
"Children of non-smoking fathers.",
"Children of heavy smokers.",
"Children from some smoking centers."
] | null | C | |
mmlu_stem | mmlu_stem_1512 | Kelly woke up one morning and went outside to her back yard. She was in a hurry because it was Mother's Day and she had to collect flowers before her mom woke up to give to her as a present. She was going to give her mom the biggest, most beautiful bunch of flowers her mother had ever seen. She knew where the best flowers were in her yard. She got a lot of different sized flowers. The red ones were big, the orange ones were small, and the green ones were in the middle. After Kelly collected all of the flowers, she went inside and tied them together with string. After that, she had to hide the flowers in a secret spot. She hoped her baby sister Morgan, who was still in diapers, wouldn't find the flowers and eat them. Kelly was worried, so she hid them in a new spot that was up higher. Finally, her mother woke up at 8:30 AM, and Kelly was excited! Kelly gave her mother the flowers. Her mother's favorite was the red one. Which flower was mother's favorite? | [
"All of them",
"The middle one",
"The smallest one",
"The big one"
] | null | D | |
mmlu_stem | mmlu_stem_6134 | We met in a crowded showroom fifteen years ago. As I inched forward I eyed him with suspicion, unsure what to make of this stranger.A salesman made the proper introductions and although we got to know each other, I didn't trust him. I call him Super. I would find myself staring at him, wondering what secrets he held. I found myself spending more and more time with Super, getting to know him, learning to trust him. My other friends soon became a little jealous, stating that I spent too much time with him. It was true, but I didn't feel guilty, for I could just be myself with him. He didn't care about my appearance, pay and failure. None of these things mattered to him. Then _ one _ day _ he _ said _ he _ was _ going _ to _ show _ me _ the _ world.He _ said _ that _ I _ could _ ask _ to _ go _ anywhere, _ anywhere _ at _ all. When I asked him to show me New York, he didn't hesitate. He showed me the bright lights of Broadway, the majestic Statue of Liberty and so much more. Late at night we played games. Sometimes I won, sometimes he did.It didn't matter because we had fun. Through him I met other people. Men and women I never would have met if it wasn't for him. Then suddenly he became sick. He was unable to do anything and I felt so helpless because I didn't know what was wrong. But I knew those who could.I paced around the room while he was examined.What if it was something serious? What if he died? I cried but luckily he was fine again. I looked at him and saw my companion, teacher, instructor, travel guide and so much more.He was my friend, my best friend.He is ... my computer. Why did the author's other friends envy Super? | [
"As Super helps the author do his housework.",
"As the author spent so much money on it.",
"As the author spent so much time on it.",
"As the author trusted nobody but Super."
] | null | C | |
mmlu_stem | mmlu_stem_21477 | Greenhouses are great for plants like | [
"Pizza",
"Lollipops",
"Candles",
"French beans"
] | null | D | |
mmlu_stem | mmlu_stem_5749 | Health experts are calling for action to expand cancer care and control in the developing world. A medical research paper says cancer was once thought of as a problem mostly in the developed world. But now cancer is a leading cause of death and disability in poor countries as well. Experts from Harvard University and other organizations urge the international community to fight cancer aggressively, saying it should be fought in the way HIV/AIDS has been fought in Africa. Cancer kills more than 7.5 million people a year worldwide. Almost two-thirds are in low-income and middle-income countries. They discover cancer dills more people in developing countries than AIDS, tuberculosis and malaria combined. But the world spends only 5% of its cancer resources in those countries. Felicia Knaul from Harvard Medical School was one of the authors of the paper. She was in Mexico when she was found to have breast cancer. She received treatment there and her experience showed her the sharp difference between the rich and the poor in treating breast cancer. Felicia Knaul says, "And we are seeing how this is attacking young women. It's the number two cause of death in Mexico for women thirty to fifty-four. All over the developing world, it's the number one cancer-related death among young women. I think we have to again say that there is much more we could do about it than we are doing about it." Professor Knalul met community health workers during her work in developing countries. They were an important part of efforts to reduce deaths from the cancer. They were able to persuade people to get tested to prevent the illness. The experts say cancer care does not have to be costly. For example, patients can be treated with lower-cost drugs. Who plays an important part in preventing the cancer in developing countries? | [
"The cancer patients.",
"The health experts.",
"Community health workers.",
"Young women."
] | null | C | |
mmlu_stem | mmlu_stem_19120 | If a fox shuffles off the mortal coil, then that fox | [
"is a burden",
"ceases to exist",
"is missing",
"is pregnant"
] | null | B | |
mmlu_stem | mmlu_stem_8299 | As his quitting date comes near, Matt McDonnell, 51, has been thinking about his life as a smoker. "It has such power over me," he admits, "but this is something I don't want to continue doing." Diagnosed with a lung disease two years ago, the private investigator who has smoked 36 years is well aware of the damage cigarettes have done to his health. When his wife Laurel bought him a bagpipe as a birthday gift a few years ago, McDonnell didn't have the lung ability to play the instrument. "I could tell it was smoking-related and I couldn't believe that my health was being stolen away." So he quit... for a while. "In four months, my skin tone improved and I noticed that I wasn't getting chest pains." But after a stressful day, McDonnell went out and bought cigarettes. " _ " Now working with non-smoking coach Angela Forfia, McDonnell says, "I find that it takes the average person seven attempts to actually quit and the big trip wires are emotional. Lesson learned: I will now follow this program-- and it had better work!" When did McDonnell begin to realize that something was wrong with his lung? | [
"When he first began to smoke in his life.",
"When he was diagnosed with a lung disease.",
"When his wife bought him a bagpipe.",
"On a stressful day."
] | null | C | |
mmlu_stem | mmlu_stem_1452 | Bailey and her friend Kara were bored one Saturday. It was a hot summer day. They didn't want to stay inside any longer but they didn't know what to do. They were tired of watching TV inside. Suddenly, Kara had an idea. She said, "Bailey, we could make some money." "How?," asked Bailey. "Well, it is hot outside," said Kara. "People are thirsty out there. We could make money by making some lemonade and iced tea and have people pay for it." "That is a great idea," answered Bailey, "let's do it!" Kara had made some iced tea with her mom earlier that day. She asked her mom permission to use it. Her mom said yes. She and Kara made two pitchers of lemonade. They got a cooler full of ice and made a sign so people knew what was for sale. Kara's mom helped them get a table and chairs and set up out on the corner in their neighborhood. It was so hot out that people who saw their stand came to buy drinks right away. Their first visitors to their stand were their friends, Abby and Molly. In a half hour, they had to close their stand. They were all out of lemonade and iced tea. They had made a lot of money. They split the money and each got ten dollars. It was a great day. Which two friends were bored one Saturday? | [
"Abby and Molly",
"Bailey and Kara",
"Abby and Bailey",
"Kara and Molly"
] | null | B | |
mmlu_stem | mmlu_stem_5201 | A huge cloud of dust rose and an overpass disappeared. This was the scene in Zhuzhou,Hunan Province on May 17.Nine people were killed and 16 injured. Things were similar last year in the Sichuan earthquake. Thousands of people were buried in the ruins and lost their lives. What if we could have warned them? People are always _ to find a way of preventing buildings' collapse. Better materials and technology help,but they are not a solution. Just like humans,a building has its own life cycle from "birth" to "death".If we know when a building is going to collapse,we can repair it in advance or get out of it before it falls. Now,scientists at the University of Illinois have developed a material that turns red before it breaks. The invention could be used in things like climbing ropes or bridge supports. The research was led by Nancy Sottos,a professor at the university's Beckman Institute,and Douglas Davis,a graduate research assistant. The secret behind the colorchanging material is a type of molecule .A molecule is a group of atoms held together by chemical bonds. Imagine you and your friends standing in a circle,holding hands. Each person stands for one atom,your hands represent the bonds,and the entire circle represents a molecule. If one person lets go of his or her hands,the molecule changes color. The research team put the molecule into a soft material. When the researchers stretched the material,it turned bright red for a few seconds before it broke into two pieces. When they repeatedly stretched and relaxed the material,without breaking it,it only turned a little red. The major problem is that light can get rid of the red color. When the team shone bright light on the molecule,the broken bond was fixed,and the color disappeared. If the bright light keeps the red color from appearing,the material's warning system will be useless. Scientists still have a lot of work to do before the colorchanging molecules can be used outside the lab. What can we infer from the passage? | [
"The colorchanging molecules are certain to be used outside the lab.",
"There will be no collapse with the help of the colorchanging material.",
"There is a long way to go before the material can be applied.",
"The problem caused by bright light will be solved by scientists."
] | null | C | |
mmlu_stem | mmlu_stem_17968 | All the ponds in an area dried up during a drought. The population of which of the following animals that live in the area is most affected by the drought? | [
"deer",
"frog",
"hawk",
"squirrel"
] | null | B | |
mmlu_stem | mmlu_stem_5535 | That "Monday morning feeling" could be a crushing pain in the chest which leaves you sweating and gasping for breath. Recent research from Germany and Italy shows that heart attacks are more common on Monday mornings and doctors blame the stress of returning to work after the weekend break. The risk of having a heart attack on any given day should be one in seven, but a six-year study helped by researchers at the Free University of Berlin of more than 2,600 Germans showed that the average person had a 20 per cent higher chance of having a heart attack on a Monday than on any other day. Working Germans are particularly not protected against attack, with a 33 per cent higher risk at the beginning of the working week. Non-workers, by comparison, appear to be no more at risk on a Monday than any other day. A study of 11,000 Italians proved 8 am on a Monday morning as the most stressful time for the heart, and both studies showed that Sunday is the least stressful day, with fewer heart attacks in both countries. The findings could lead to a better understanding of what is the immediate cause of heart attacks, according to Dr Stefan Willich of the Free University. "We know a lot about long-term risk factors such as smoking and cholesterol but we don't know what actually causes heart attacks, so we can't give clear advice on how to prevent them," he said. Monday mornings have a double helping of stress for the working body as it makes a rapid change from sleep to activity, and from the relaxing weekend to the pressures of work. "When people get up, their blood pressure and heart rate go up and there are hormonal changes in their bodies," Willich explained. "All these things can have an unfavourable effect in the blood system and increase the risk of a clot in the arteries which will cause a heart attack." "When people return to work after a weekend off, the pace of their life changes. They have a higher workload, more stress, more anger and more physical activity," said Willich. To protect people from suffering from heart attack, doctors have paid much attention to _ . | [
"people's working time",
"people's living place",
"people's diet and lifestyle",
"people's nationalities"
] | null | C | |
mmlu_stem | mmlu_stem_2382 | If you and your friends wish to share a secret, you can write it in code, and no one else will be able to read it. Codes are one way of writing in secret. Ciphers are another. In a code each word is written as a secret code word or a code number. In a cipher each letter is changed. Codes and ciphers have played an important role in the history of the world. Julius Caesar, the Roman ruler who defeated almost all the countries in Europe about 2,000 years ago, used a cipher when he sent secret messages to his troops. During the American Revolution, George Washington's spies used a kind of code to send his information about the enemy before his military action. In World War II, the Americans"broke"or figured out Japan's most important navy codes and got enough information to destroy a powerful Japanese fleet. Storekeepers use codes to mark their goods. The codes show how much is paid for the goods or when they are added to the stock. Businessmen use codes to hide plans from their business enemies. Sometimes personal letters or diaries are written in code. Many people enjoy figuring out codes and ciphers simply as a hobby. In the 16th century, codes and ciphers were very popular among scientists. They wrote messages to each other in code so that no one else would learn their secrets. Geronimo Gardano, an Italian astrologer , mathematician, and doctor, invented the trellis cipher. He took two sheets of paper and cut exactly the same holes in each one. Then he sent one sheet, which he called a trellis, to a friend and kept the other for himself. Whenever he wanted to write a message, he put his trellis over a clean sheet of paper and wrote the secret message through the holes. There he removed the trellis and filled the rest of the paper with words that would make sense. When his friend received it, he put his trellis over the writing and read the secret message. Which of the following statements is TRUE? | [
"Ciphers can be broken or figured out more easily than codes.",
"You could read some words in Geronimo's letter without his trellis.",
"The first person who ever used a cipher in history was Julius Caesar.",
"Fondness of using codes was the hobby of the scientists in the 1600s."
] | null | B | |
mmlu_stem | mmlu_stem_13432 | This is a picture of a classroom. The classroom is big and clean. You can see a teacher's desk, six desks and seven chairs. You can see a girl and a boy ,too. Four books are on the teacher's desk. A pencil case is on the desk. Two pens and two rulers are in the pencil case .A school bag is under a chair. A ball is on the floor. The girl is Mary, She is 11.The boy is Jack. He is 12.They are is Class Two. They are friends. The teacher is Miss Smith. She is not here. The two pens are _ | [
"in the pencil case",
"on the teacher's desk.",
"on the floor",
"in the bag"
] | null | A | |
mmlu_stem | mmlu_stem_2840 | Mary Somerville was born in 1780 in Burntisland, Scotland. Her contribution to mathematics was in both algebra and differential and integral calculus . Mary was one of the world's first famous female mathematicians. She became interested in mathematics and decided to study it at the time when it was considered unacceptable for a woman to do so. She bought books on algebra and geometry and read them at night. In spite of disapproval from people around her, she firmly went on with her struggle to learn. She won a prize for her solution to an algebra problem. She went on to write several books on mathematics. Later in her life, she thought deeply about the years in which she had persevered almost without hope and said, "It taught me never to lose heart." Mary's way of learning remains useful today. If she worked for a while on a problem without coming up with an idea, she stopped working and turned her attention to the piano, her needlework, or a walk outdoors. She then returned to the problem with a fresh mind and a solution turned up. If she could not understand a passage while reading, she would forget about it and read on; several pages later, the meaning of the puzzling passage would become clear to her. According to the passage, if you have been puzzled by a math problem, you'd better _ . | [
"keep working on it until it is solved",
"just forget about the problem",
"turn to your math teacher for help",
"listen to light music for a while and then continue working on it"
] | null | D | |
mmlu_stem | mmlu_stem_15694 | Mr. White was in bed and was trying to go to sleep when he heard the doorbell ring. He turned on the light and looked at the clock. It was half past twelve. "Who can be it at this time of night?" he wondered. He decided to go and find out. So he got out of bed, put on his jacket and went to the door. When he opened the door, there was nobody there. "That's very strange," he thought. Then he went back to his bedroom, took off his jacket, got back into bed, turned off the light and tried to go to sleep. A few minutes later he heard the doorbell ring again. Mr. White jumped out of the bed very quickly and rushed to the door. He opened it, but again he found no one there. He closed the door and tried not to feel too nervous. Then he saw a piece of paper on the floor inside the door. He picked it up. There were some words on it: "Now it's after midnight, so it's April 1st. Happy April Fool's Day!" "Oh, it was the funny boy next door!" Mr. White smiled. ,. Whenheopenedthedoorforthefirsttime,he found _ outside the door. | [
"no one",
"a boy",
"his friend",
"a piece of paper"
] | null | A | |
mmlu_stem | mmlu_stem_10418 | Some fish may contain harmful chemicals, which can be the result of both natural causes and water pollution. Mercury is a poisonous chemical, which occurs naturally in oceans and the Earth's crust , but also comes from man-made sources, such as farm chemicals, burning garbage, oil, coal, etc. Polyclilorinated bipheuyls (PCBs), a group of chemicals, can also be found in some fish. These man-made chemicals were used in many industries until 1977, when they were banned. PCBs were released or leaked into (lie tar and water and have bear transported around the globe. How do mercury and PCBs end up in fish and the food supply? When they arc released into the air, they attach themselves to particles .These particles settle on the ground and in the water and are eventually eater by micro-organisms. Small fish cat the micro-organisms, and large fish eat the small fish and on up the food chain. Because they can negatively affect your health, the U.S. Eavirotunental Protectioc Agency advises that kids younger than 15 years old avoid fish that cortain high levels of mercury and PCBs. These include shark, swordfish, king rrnackerel, and tilefish. There are also many types of fish that are good for you, but arc in danger of being wiped out because of ovcrfishing. Sonic are being fished in the wild so much that they cannot reproduce enough to survive.Others re being farmed in ways that are not environmentally friendly. These fish include red snapper.Atlantic salmon, bluefnn tuna. and king crab. Despite these problems, there are several fish that are both healthy and sustainable , such as Alaskan salmon, American catfish, Pacific cod, and several fans-raised fish and shellfish. Which of the fish is safe for children according to the passage? | [
"Shark.",
"Pacific cod.",
"King mackerel.",
"Atlantic salmon."
] | null | B | |
mmlu_stem | mmlu_stem_8319 | Beach volleyball is one of those sports that can be an exciting game to play and watch. It's really easy, and all you need is sand, a net and a group of people, of any age or fitness level, who want to have fun. Beach volleyball can be played with as few as two people in each team, making a total of four people. However, if you are less skilled and experienced in the game, it will be easier to play with a larger team. The more players you have, the less ground each person will be responsible for covering and the more time they will have to recover between shots. If you only have a few players, each of you will get a lot of running for the ball after each volley . If you are looking for a relaxing, fun, low-key experience, choose larger teams. Beach volleyball is similar to regular volleyball in its rules. However, even experienced volleyball players do not realize how much more difficult it is to run and jump on sand. Since it is harder to move quickly on sand than a hard surface, play will be much slower than regular volleyball on a court. When an athlete trains for beach volleyball, he will focus on building lower body strength as well as upper body strength. Strengthening his legs is extremely important. This improves the player's ability to move quickly and accurately on sand despite the resistance. The ability to jump high and land without injury is necessary for beach volleyball players. Whether you are in it for the competition, or just to have a great time with your friends, beach volleyball can be extremely exciting and fun. You may start out with friends and may soon fall in love with the sport. When playing beach volleyball, in which of the following situation will you feel most relaxed? | [
"Playing in a 2-person team.",
"Playing in a 4-person team.",
"Playing in a 6-person team.",
"Playing in an 11-person team."
] | null | D | |
mmlu_stem | mmlu_stem_6271 | While astronauts in space get to do many exciting things, they miss out on ordinary things that we all take for granted--being able to walk on firm ground, hanging out with family and digging into a slice of hot steaming pizza. Though not much can be done about the first two things, there may soon be a solution to the third one, thanks to this cool 3-D pizza printer! About a year ago, NASA offered $125 ,000 to Anjan Contractor, a 3-D technology expert, to build a device that would allow astronauts to make pizza on demand. The mechanical engineer promised that his invention would produce pies in large quantities that looked, tasted and even smelled like pizza made in common ovens. Late last year, the engineer presented a video of his first prototype that begins by creating a single slice of dough that is cooked and printed at the same time. Then comes the tomato "sauce" -- a mix of tomato powder, oil and water and finally, a protein slice that resembles cheese. While the video doesn't show the baking process, the inventor says that once the pizza is printed, it can be ready to be consumed in 7 seconds. While the pie in the video looks delicious enough to attract any pizza lover, Anjan Contractor is far from ready for astronauts. That's because he still has to find a solution to make the food container in the printer last for 30 years. Though that may sound unrealistic, actually it is not. Anjan Contractor believes that the only way that is possible is that the water is removed from all the ingredients and then they are reduced to the powder form. This, as you can imagine, will not be so easy. But, while the printer may not be ready for space, it certainly looks ready enough for people on earth. Hopefully, NASA and Contractor will consider selling it to those not fortunate enough to go to Mars! The biggest challenge that Anjan Contractor is faced with now is probably that _ . | [
"he has no money left to go on with his research",
"the pizza doesn't seem appetizing to pizza lovers",
"he has no way to make pizza that can last for thirty years",
"he cannot make the food container last for decades"
] | null | D | |
mmlu_stem | mmlu_stem_18926 | Every twenty-four hours and fifty minutes, the moon can have an effect on bodies of water causing them to | [
"swell",
"float",
"die",
"burn"
] | null | A | |
mmlu_stem | mmlu_stem_10883 | Since American students have been introduced into the era of the Massive Open Online Course, the opportunity for cheating appears greater than ever. The all-knowing Google search engine is within easy reach. So how can a teacher handle such a large number of examinees so far away, let alone searching out cheaters taking tests across the Internet? Using technology, of course. While special services via webcam and cheating detecting software have been developed now, Mettl, an online company, has developed advanced techniques for netting cheaters, which the company claims are even more reliable and easier to use. Whatever small attempt to cheat, he or she will be found out. Mettl has adopted a mass of technologies on its test-taking platform, creating a mini monitoring state in an exam. Here's how it works: A test-taker signs on to Mettl and selects his/her exam from the site's library of pre-loaded tests. Facial and keystroke recognition technology confirm the person that has signed in is the very person, and the system records both the test-taker (through the webcam) and the test-taker's screen throughout the test. Mettl's technology uses the test-taker's webcam to detect how many people are using the computer. Soon, it will track eye movement well enough to sense whether the test-taker is looking away from the screen, perhaps to consult a smart phone or a friend in secret. Mettl also monitors the test-taker's screen and can detect when the test-taker has changed a computer or moved from the test. The system will soon be able to record sound, detecting whether the test-taker is talking or being talked to. If any wrongdoings are detected, the system flags the incident and reports it back to the test's administrator. This can bring any number of things, depending on the test-giver's wishes: a complete shutdown of the exam, a warning message that appears on the test-taker's screen, even human instructions from the control center. Mettl is hoping its technology will help it break into the country's big MOOC markets. How can Mettl help to get rid of cheating online? | [
"By equipping teachers with cameras.",
"By asking test-takers to sign in.",
"By providing different tests at a time.",
"By recording the test-takers' behaviors."
] | null | D | |
mmlu_stem | mmlu_stem_11388 | Penguins can taste only sour and salty food, scientists have discovered. A genetic study suggests the flightless birds lost three of the five basic tastes long ago in evolution. Taste is critical for survival in most animals, but may not matter in the penguin, which swallows fish whole, say researchers in China and the US. Many other birds are unable to taste sweet things, but they do have receptors for detecting bitter and umami (or meaty) flavours. The discovery was made when researchers decoding penguin genomes found some of the taste genes were missing. A closer look at the DNA of penguins revealed that all species lack functioning genes for the receptors of sweet, umami, and bitter tastes. "Based on genetic data, penguins are believed to have sour and salty tastes, but have lost sweet, umami, and bitter tastes," lead researcher Prof Jianzhi Zhang, of the University of Michigan, US, and Wuhan University, China, told the reporter. The umami taste gives food the strong, savoury flavour associated with meat. Lacking this sense is surprising for a carnivorous animal, but does not matter that much in the penguin, which swallows fish without chewing. "Their behaviour of swallowing food whole, and their tongue structure and function, suggest that penguins need no taste perception," said Prof Zhang. "Although it is unclear whether these traits are a cause or a consequence of their major taste loss." The findings, published in Current Biology journal, were a puzzle, he added. One clue comes from the bird's evolution on the frozen ice sheets of Antarctica. Sending signals from sweet, umami, and bitter (but not sour or salty) taste receptors to the brain does not work at very low temperatures. This may have led to the penguin gradually losing its sense of taste, say the researchers. Intriguingly , the sweet taste is missing in almost all birds. The hummingbird, which feeds on sweet nectar, is an exception. Which of the following animals can taste sweet flavour according to the passage? | [
"The penguin.",
"The hummingbird.",
"The polar bear.",
"The fish."
] | null | B | |
mmlu_stem | mmlu_stem_305 | Infectious diseases are caused by | [
"allergies",
"vitamin deficiencies",
"chemical spills",
"microorganisms"
] | null | D | |
mmlu_stem | mmlu_stem_4269 | Plants, like animals, are subject to diseases of various kinds.It has been estimated that some 30,000 different diseases attack our economic plants; forty are known to attack corn, and about as many attack wheat.The results of unchecked plant disease are all too obvious in countries which have marginal food supplies.The problem will soon be more widespread as the population of the world increases at its frightening rate.Even in countries which are now amply fed by their agricultural products there could soon be the major crops; the resulting famines could kill millions of people, and the resulting hardship on other millions could cause political upheavals disastrous to the order of the world. Some plants have relative immunity to a great many diseases, while others have a susceptibility to them.A blight may be but a local infection easily controlled; on the other hand it can attack particular plants in a whole region or nation.An example is the blight which killed virtually every chestnut tree in North America.Another is the famous potato blight in Ireland in the last century.As a result of that, it was estimated that one million people died of starvation and related ailments. Plant pathologists have made remarkable strides in identifying the pathogens of the various diseases.Bacteria may invade a plant through an infestation of insect parasites carrying the pathogen.A plant can also be inoculated by man.Other diseases might be caused by fungus which attacks the plant in the form of a model or smut or rust.Frequently such a primary infection will weaken the plant so that a secondary infection may result form its lack of tolerance.The symptoms shown may cause an error in diagnosis, so that treatment may be directed toward bacteria which could be the result of a susceptibility caused by a primary virus infection. Unchecked plant disease won't result in _ . | [
"food shortages in poor country",
"food shortages in rich country",
"increase of world population",
"disaster in world politics"
] | null | C | |
mmlu_stem | mmlu_stem_4533 | It was 3:12 a.m. when nine-year-old Glenn Kreamer awoke to the smell of burning. Except for the crackling of flames somewhere below there was not a sound in the two-storey house at Baldwin, Long Island. With his father away on night duty at a local factory, Glenn was worried about the safety of his mother, his sister Karen, 14 and his 12-year-old brother Todd. He ran downstairs through the smoke-filled house to push and pull at Karen and Todd until they sat up. Then he helped each one through the house to the safety of the garden. There, his sister and brother, taking short and quick breaths and coughing, collapsed on the lawn. The nine-year-old raced back into the house and upstairs to his mother's room. He found it impossible to wake her up. Mrs. Kreamer, a victim of the smoke, was unconscious, and there was nobody to help Glenn carry her to the garden. But the boy remained calm and , as a fireman said later, "acted with all the self-control of a trained adult." On the bedroom telephone, luckily still working, Glenn called his father and, leaving Mr. Kreamer to telephone the fire brigade and ambulance service, got on with the task of saving his mother. First he filled a bucket with water from the bathroom and threw water over his mother and her bed. Then, with a wet cloth around his head he went back to the garden. He could hear the fire engine coming up, but how would the firemen find his mother in the smoke-filled house where flames had almost swallowed up the ground floor? Grasping firmly a ball of string from the garage, Glenn raced back into the house and dashed upstairs to his mother's room. Tying one end of the string to her hand, he ran back, laying out the string as he went, through the hall and back out into the garden. Minutes later he was telling fire chief John Coughlan: "The string will lead you to my mother." Mrs. Kreamer was carried to safety as the flames were breaking through her bedroom floor. What did Glenn do to protect himself? | [
"He put a wet cloth around his head.",
"He threw water all over himself.",
"He hid himself in the bathroom.",
"He rushed out to the lawn."
] | null | A | |
mmlu_stem | mmlu_stem_20650 | Within a power station meant to process coal, electricity is | [
"broken",
"reaped",
"destroyed",
"devasted"
] | null | B | |
mmlu_stem | mmlu_stem_135 | What is the frequency of ocean waves that have a speed of 18 m/s and a wavelength of 50 m? | [
"0.18 Hz",
"0.36 Hz",
"2.8 Hz",
"9.0 Hz"
] | null | B | |
mmlu_stem | mmlu_stem_16802 | Want ads (1) Wanted :"Are you hard-working ?" Do you like to meet people? If your answer is "Yes", then we have a job for you as a waiter, call AL Hotel at 556779! (2)Summer Job: Do you like to talk with people ? Do yu like to write stories? If you want to work for our magazine as a reporter. Please call Karen at 558366. (3)Help wanted: Do you like babies ? Can you look after one baby for two days ? If you are sure to take good care of it, call us at 766588. $80 or more. Today ! Hurry ! (4)Cleaner wanted: Can you make a large house clean and tidy? If you hope to get the job paid at $20 once, call us this evening 18:00-20:00 Tel : 633800. If the owner of the large houses asks a cleaner to tidy his house twice a week ,how much willl the cleaner get in a month? | [
"$120",
"$160",
"$200",
"240"
] | null | B | |
mmlu_stem | mmlu_stem_8090 | A 15-year-old Saanich student who invented a flashlight powered by body heat is heading home today from California with a big prize--and an opportunity to expand on her work. St. Michaels University School student Ann Makosinski was the only Canadian among the four winners at Google's annual international science fair, beating out thousands of other young scientists from around the world. Winning the international contest was "a total shock", Ann said from San Francisco. "I definitely think it will have an influence on my future." Ann thanked her family for encouraging her interest in science, telling the judges that her first toy was a box of transistors . Ann's prize includes a $25,000 scholarship and a "once-in-a-lifetime experience" from either the European Organization for Nuclear Research, Lego or Google for her Hollow Flashlight, which has no moving parts or batteries. Ann created the flashlight for a local science fair. The inspiration for the invention came from seeing unwanted batteries and after visits to the Philippines, where she saw the need for a battery-free flashlight. A friend at school there failed in her studies because of a lack of electricity and light to study when it became dark. In her project, Ann wrote that she "made two flashlights that do not use any batteries, harmful chemicals, or kinetic energy . They do not create any noise and will always work. The flashlight's only limitation is its need for at least a 5degC temperature difference to provide usable light." A You Tube video of Ann explaining how she created the flashlight has been viewed more than 1.4 million times. Despite her success, the private school student is undecided about her career path. Ann hopes she can find a way to combine her love of film with science. The four winners were chosen from 15 finalists from eight countries. The contest attracted thousands of entries from students in 120 countries. According to the passage, Hollow Flashlight _ . | [
"is safe, noiseless and energy-saving",
"was created by Ann and her friend",
"will come onto the market soon",
"works only at low temperatures"
] | null | A | |
mmlu_stem | mmlu_stem_22432 | You find a furry creature walking around. What feature would also describe this animal? | [
"dead, cold-blooded, and scaly",
"cold, cold-blooded, hungry, alive",
"horned, warm-blooded, hungry, alive",
"warm, warm-blooded, and also dead"
] | null | C | |
mmlu_stem | mmlu_stem_15511 | Animals do many different, amazing things to get through the winter. Some of them migrate .Many birds migrate in autumn. Because the trip can be dangerous, some travel in large groups. For example, geese fly in noisy, "V"-shaped groups. Other kinds of birds fly alone. Some animals stay active in winter. They must change themselves as weather changes. For example, a kind of rabbits grow white fur to help them hide in the snow. It's hard to find food in winter for animals. Some animals, like mice, collect lots of food in autumn. Some animals eat different kinds of food as the seasons change. The red fox eats fruit and insects in spring, summer and autumn. In winter, it cannot find these things, so it eats small animals instead. Some animals hibernate for part or all of the winter. This is a special, very deep sleep. The animal uses very little energy. In autumn, these animals get ready for winter by eating much more food than in summer and storing it as body fat. Squirrels store food like nuts to eat later in winter. Bears and some bats hibernate. Cold-blooded animals like fish, frogs and snakes have no way to keep warm during the winter. Snakes find protection in holes, and spend the winter without moving during the whole season. Which is the best title for the passage? | [
"How Do Animals Spend the Winter?",
"Why Do Animals Spend the Winter?",
"How Do Living Things Get Food in Winter?",
"Where Do Living Things Move in Winter?"
] | null | A | |
mmlu_stem | mmlu_stem_19686 | The most daylight is two months after | [
"October",
"July",
"January",
"April"
] | null | D | |
mmlu_stem | mmlu_stem_105 | Sulfur (S), oxygen (O2), water (H2O), and sodium chloride (NaCl) are all examples of pure substances. Which of the following describes all pure substances? | [
"A pure substance consists of only one type of element.",
"A pure substance has a definite chemical composition.",
"A pure substance cannot be broken down into simpler substances.",
"A pure substance is normally found as a solid at room temperature."
] | null | B | |
mmlu_stem | mmlu_stem_19429 | Muscles pull on bones in order to move them; which is an example of that? | [
"shaking your head in frustration",
"rolling your eyes at someone",
"wiggling your tongue in your mouth",
"wrinkling your nose at a smell"
] | null | A | |
mmlu_stem | mmlu_stem_17432 | Which correctly arranges three scientific terms-theory, law, and hypothesis-from least to most accepted or tested? | [
"theory, hypothesis, law",
"hypothesis, law, theory",
"theory, law, hypothesis",
"hypothesis, theory, law"
] | null | D | |
mmlu_stem | mmlu_stem_1602 | Ally wanted to bake a cake for her best friend Kelly's birthday. Ally called her friend Melissa saying that she needed Melissa's help to make the cake. Melissa wanted to bake cookies and cupcakes too. Ally said that was okay and to buy everything. Melissa went to the store and bought everything. Melissa went to Ally's house and they started to make the cake. After baking the cake, they started making cookies and cupcakes. The house smelled great. They had a lot of fun baking. After cleaning up, they called Kelly to come over to Ally's house and surprise her for her birthday. Kelly was surprised and so was their friend Shannon. The girls ate the cake and snacked on the cookies and cupcakes. The ladies laughed and talked as they ate. After eating, they watched a movie on Ally's TV. It was a good movie and the ladies all laughed and talked about it after. Kelly and Shannon left Ally's house to go home. Melissa and Ally said bye and had big smiles. It was a great day, and Ally was happy. How many friends does Ally have? | [
"3",
"1",
"0",
"2"
] | null | A | |
mmlu_stem | mmlu_stem_16212 | A kind of little cars may be seen in the streets in the future. People will like this kind of small cars better than the big ones. The car is as small as a bike. But it can carry two people in it. Everybody can drive it easily, just like riding a bike. Even children and old people can drive them to schools or parks. If everyone drives such cars in the future, there will be less pollution in the air. There will be more space for all the cars in cities, and there will also be more space for people to walk in the streets. The little cars of the future will cost less money to buy and to drive. These little cars can go only 65 kilometers an hour, so driving will be safer. The cars of the future will be fine for going around the city, but they will not be useful for a long trip. This kind of cars can save a lot of gas. They will go 450 kilometers, then they have to stop for more gas. They are nice cars, aren't they? Why do these little cars have to stop after going 450 kilometers? | [
"For more water.",
"For more gas.",
"To have a rest.",
"To charge"
] | null | B | |
mmlu_stem | mmlu_stem_13583 | My name is Dennis. I'm a worker of a big store. I don't work in the morning. I work at night. Every morning I come home at about 6:30. I have breakfast at 7:00. After breakfast I go to bed. I get up at around 2:30. I have lunch at 2:45 and dinner at 7:40. Then I go to work at 8:30. My work starts at 9:00. I look after the store every night. I like my work very much. . When does he go to bed? | [
"After breakfast.",
"After lunch.",
"After dinner.",
"in the evening"
] | null | A | |
mmlu_stem | mmlu_stem_14699 | As soon as the woman got into the house, her eight-year-old daughter told her that her younger brother drew so many pictures on the clean wall of his bedroom and left the white wall in a mess. When the woman heard this, she was angry. "Where's your brother now?" "He's hiding himself in the cupboard in his bedroom." The little girl answered. The woman got even angrier. She complained about her son when she went towards her son's bedroom. The six-year-old boy was staying with fear in the cupboard when he heard what his mother said. He knew she got really angry this time. The woman pushed the door open with a loud noise. But when she saw the words and pictures on the wall, her anger soon disappeared. "I love you, mum!" covered the whole wall, with so many hearts around them, and so many stars in the sky. The mother's eyes were full of happy tears. She opened the door of the cupboard, and hugged her son tightly. The boy said "I love you, Mum!" to her mother in a low voice when he was in his mother's arms. It's the most expensive present from her son -- "Love on the wall". Eight years later, the boy suddenly died of heart disease. The mother had kept the wall tidy with great care for nearly fifty years until she was dead. In the mother's heart, it seemed that her son was alive, and always looking at her in the sky with many shining stars around him. How old might the girl be now? | [
"Sixteen years old.",
"Thirty years old.",
"Fifty-eight years old.",
"Sixty-six years old."
] | null | D | |
mmlu_stem | mmlu_stem_1160 | A sample in a cylindrical container has a cylindrical shape and a fixed volume. The state of matter of the sample | [
"must be solid.",
"could be either solid or liquid.",
"must be liquid.",
"could be either liquid or gas."
] | null | B | |
mmlu_stem | mmlu_stem_21740 | What is most like a fish? | [
"offspring of frogs",
"a desk",
"a diva",
"a solar system"
] | null | A | |
mmlu_stem | mmlu_stem_1568 | Max was a little dog that loved to ride the train. Every day when the sun came up Max would run down to the stop and wait until the train stopped and jump on. He thought this was the best time of his life. He always wore a blue collar and a red piece of fabric. Except for on the weekends he would wear a green collar. Sometimes when Max would run next to the train, he would get a splash of mud on his fur. His friend, Bob, didn't like it when Max came home dirty. If Max came home with mud on his fur, Bob would make him sleep outside for the night, but if Max came home clean he would sleep in the house. Max didn't mind sleeping outside, because he could hear the train's whistle and he would dream all night about the train. The funny thing about Max was that he didn't like going for a drive with Bob in a car, on a bike or in a boat. The only way you get Max to go somewhere was on a train. Max must have been a train driver in a past life. What color did collar did the dog wear on Mondays? | [
"red",
"green",
"blue",
"yellow"
] | null | C | |
mmlu_stem | mmlu_stem_16207 | Rose has four cousins.They are Ann, Betty, Peter and Bill.Pose is the oldest of them.Betty is thirteen years old.She is two years younger than Pose and one year older than Peter.Bill is nine.Ann, the youngest is seven. Betty and Peter are good at running.But Peter runs faster.Pose and Ann like to play basketball.Rose plays better than Ann.Bill is the best singer of them five.Rose an Betty study in a middle school.Ann, Peter and Bill study in a primary school.These five children all work hard at their lessons.But Betty works the hardest. Rose is _ years older than Peter. | [
"two",
"three",
"six",
"eight"
] | null | B | |
mmlu_stem | mmlu_stem_7102 | We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alternating with some 16-17 hours' wakefulness and that the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified. The question is no mere academic one. The ease, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently. The only real solution appears to be to hand over the night shift to a number of permanent night workers. An interesting study of the domestic life and health of night-shift workers was carried out by Brown in 1957. She found a high incidence of disturbed sleep and other disorders among those on alternating day and night shifts, but no abnormal occurrence of these phenomena among those on permanent night work. This latter system then appears to be the best long-term policy, but meanwhile something may be done to relieve the pressure of alternate day and night work by selecting those people who can adapt most quickly to the changes of routine. One way of knowing when a person has adapted is by measuring his body temperature. People occupied in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night; when they change to night work the pattern will only gradually go back to match the new routine and the speed with which it does so parallels, broadly speaking, the adaptation of the body as a whole, particularly in terms of performance. Therefore, by taking body temperature at two-hour intervals throughout the period of wakefulness, it can be seen how quickly a person can adapt to a reversed routine, and this could be used as a basis for selection. So far, however, such a form of selection does not seem to have been applied in practice. The best solution for implementing the 24-hour working system seems to be _ . | [
"to change shifts at longer intervals.",
"to have longer shifts",
"to arrange for some people to work on night shifts only",
"to create better living conditions for night workers"
] | null | C | |
mmlu_stem | mmlu_stem_17937 | Which three systems of the human body function together to move and control body parts? | [
"nervous, skeletal, and muscular",
"muscular, endocrine, and excretory",
"digestive, excretory, and reproductive",
"circulatory, endocrine, and respiratory"
] | null | A | |
mmlu_stem | mmlu_stem_14712 | Spending two or three hours playing outdoors each day can reduce a child's chance of becoming short-sighted, a research shows. It challenges the belief that short-sightedness is caused by computer use, watching TV or reading in weak light. The Australian government researchers believe that sunlight is good for people's eyes. They compared the vision and habits of 100 seven-year-old children in Singapore and Australia. In all, 30% of the Singaporean children were short-sighted--this rate was ten times higher than Australian children. Both groups spent a similar amount of time reading, watching television and playing computer games. However, the Australian children spent an average of two hours a day outdoors--90 minutes more than the Singaporean children. Professor Ian Morgan, from the Australian Research Council's Vision Centre, said, "Humans are naturally long-sighted, but when people begin to go to school and spend little or no time outdoors, the number of short-sighted people gets larger. We're also seeing more and more short-sighted children in cities all around the world--and the main reason may be that city children spend less time outdoors." Daylight can be hundreds of times brighter than indoor light. But why does playing outside prevent us from becoming short-sighted? Scientists believe that natural light has a special chemical which stops the eyeball from growing out of shape and prevents people becoming short-sighted. So be outdoors. It doesn't matter if that time is spent having a picnic or playing sports. Which of the following is true according to the passage? | [
"People will all become short-sighted after they begin to go to school.",
"Playing outdoors for 2 or 3 hours every day can help protect your eyesight.",
"Children in Australia are more likely to get short-sighted than those in Singapore.",
"If you spend two or three hours playing outside each day, you won't g... | null | B | |
mmlu_stem | mmlu_stem_14757 | Do you like singing or playing musical instruments ? If you say "yes", you can join us! We have piano lessons every Friday evening in our club. We also have guitar lessons on Monday evening. You don't have to pay -- The lessons are all free. Just come and have a try!We also have classes to teach students singing skills on Tuesday evening. If you like singing, you will find them useful. In our club you can meet many students from different classes and you can make friends with them. Come on! Join us! From the poster , we can know that _ . | [
"students must pay to join this club",
"students must play musical instruments very well to join this club",
"students must sing very well to join this club",
"students can make some new friends in the club"
] | null | D | |
mmlu_stem | mmlu_stem_1769 | One Saturday afternoon about the second week of May, Maggie and her mom Jan went to the dentist. Maggie was seven years old and she was scared of the dentist, but her mom promised to fix her favorite chicken dish for dinner if Maggie was a good girl. "At least it's not the doctor's!" she said. They got to the dentist office and Jan told the woman, named Tiffany, at the front desk that they were there. There were lots of toys in the waiting room but Maggie was too nervous to enjoy them like the other kids. Finally, a woman came and told Maggie and Jan that it was Maggie's turn. They made a right turn and went to the third room on the left. Maggie sat down in the dentist's chair. A woman, Mary, came in and cleaned her teeth and told Maggie and Jan that Maggie had done well with her brushing. Then the dentist, Taylor, came in and did a checkup. He saw that everything was good and that Maggie had no problems with her teeth. He gave Maggie a bag with a toothbrush, toothpaste, and a sugar free candy. There was also a smiley face sticker in the bag. Jan was proud of her daughter and stopped at the grocery store to get ingredients for the chicken dish for dinner as promised. What was in the bag that the dentist gave to Maggie? | [
"toothbrush, toothpaste, candy, and sticker",
"toothbrush and toys",
"toothbrush, toothpaste, and candy",
"toothbrush and toothpaste"
] | null | A | |
mmlu_stem | mmlu_stem_7138 | On October 12, 1987, some Chinese scientists were working at the computers to look for information they needed. Suddenly they saw a lot of very bright spots( )crossing the computers' screens. At the same time the computers were working much slower. To find out what was happening they stopped their work to check some parts of the computers. To their horror , they found out that most of their stored information was got rid of( ) by computer viruses! Obviously all these computers had been infected( ) by computer viruses. It is said that the computer viruses were made by a group of young man fond of playing tricks. They all had excellent education. They created the viruses just to show their intelligence. These kinds of computer viruses are named Jerusalem( )Viruses. These viruses can stay in computers for a long time. When the time comes they will attack the computers by lowering the function , damaging their normal programs or even getting rid of all the information. We now come to know that Jerusalem Viruses often attack computers on Fridays and that they are spreading to a list of computers. Among the countries that suffering computer viruses are Britain, Australia, Switzerland and the U.S. But till now, how to get rid of the terrible remains a problem. The group of young men created the viruses to _ . | [
"damage the computers",
"test their ability",
"play a trick on operators of the computers",
"tell the world that they were intelligent"
] | null | D | |
mmlu_stem | mmlu_stem_12140 | Scientists can determine someone's favorite food from their shape. They have discovered that the arrangement of taste buds on the tongue varies for different body types. The scientist team examined 1,000 British adults and divided them into three physiologically recognized body types--ectomorphs, endomorphs mesomorphs. They determined that a person's body type indicated where they were likely to have the most taste buds - on the sweet, bitter or salty areas of their tongues. The study showed that ectomorphs, who make up one in three of the population, usually have a small delicate shape, have a sweet tooth but hate bitter foods. Mesomorphs, who make up 20percent of the population, usually have a muscular shape and prefer salty and bitter foods but dislike sweet foods. Half the British population are endomorphs with soft, rounded bodies, and they like most foods. The findings showed that for two in three people food preference was a physiological rather than a psychological choice. Body shape expert Simon Bradshaw, who takes change of his team, said, "It appears that simply by looking at a person's body shape we can make sure about their taste preferences." But Catherine Collins, of the British Dietetic Association said, "It is difficult to tell whether our body shape dictates the food we like, or the food we like dictates body shape. _ people who prefer most types of foods will be fatter and people who are the endomorph shape tend to find it more difficult to lose weight." According to Catherine, it is uncertain _ . | [
"how many body shapes there are",
"that food preference is a physiological choice",
"whether our body shape is decided by the food we enjoy most",
"how taste buds arrange on the tongue"
] | null | C | |
mmlu_stem | mmlu_stem_16241 | If your mother told you to eat carrots so you'd be able to see in the dark, she was right. It turns out that feeding kids carrots is just one of a number of things to keep eyes healthy. Other things include regular eye exams, and sunglasses or hats are also very helpful, experts say. While eye disease is sometimes hereditary , some are still preventable , said Dr. Ron Weber, an Atlanta-based ophthalmologist. For example, nearsightedness, "not only has a genetic component but is also influenced by how kids use their eyes during childhood," he told Reuters Health by phone. He said that extended close work, such as reading, has long been thought to cause nearsightedness. Recent support has come from a study in which people with a higher level of education were more likely to have nearsightedness, because they spend more time reading or working on computers. Another study showed that children who spend more time outdoors are less likely to become nearsighted. But these findings don't mean kids should be stopped from reading or working on the computer. Instead, Weber suggests, make sure a child's environment is bright enough while they are doing close work. Parents should also help kids get into the habit of holding their reading material at the perfect distance - about 18 to 22 inches, he said. Finally, taking a break every five minutes or so, to let the eyes relax and focus on an object in the distance, will also help. One of the most important things a parent can do to help _ eye disease and vision problems is to make sure their child gets regular eye exams, beginning early in life. "The majority of vision problems in children are preventable and treatable," said Dr. Ida Chung. Which can be the BEST title for this passage? | [
"Eating carrots",
"Eye disease",
"How to keep eyes healthy",
"The importance of eye health."
] | null | C | |
mmlu_stem | mmlu_stem_5445 | In most situations, light helps us see. But when it comes to looking at the night sky, light is actually a kind of pollution. It prevents our view of some of life's most striking sights: stars, planets, and even galaxies . "When I was a little boy, I loved the night sky. I remember looking up and the sky was filled with stars. I became an astronomer because I was amazed by their beauty," says Robert Gent, "Now in most big cities kids can't see the stars like I did." Normally, about 2,500 individual stars are visible to the human eyes without using any special equipment. But because of light pollution, you actually see just 200 to 300 and fewer than a dozen from some cities. Only one in three Americans can see our own galaxy with the naked eyes. Those people live far away from the lights of big cities, office buildings, and shopping malls. Fortunately, there's an inexpensive and useful way. If we shine lights down at the ground instead of up into the sky, and use lower brightness levels, we can save big amounts of energy and keep the beauty of the night sky. Many cities and towns have passed laws limiting lights at night, making sure enough shine for safety without creating much light pollution. Light pollution affects more than our view of the heavens and can harm wildlife. Migrating birds sometimes fly over cities and become confused by the brightness, flying in circles until they drop from _ Sea turtles need dark beaches for nesting and won't approach bright lights. Too much light at night may even affect human health. For all these reasons, researchers are working on ways to use lights only when and where they are truly needed. Everyone deserves to look up at the sky. Which would be the best title for the text? | [
"Light Pollution",
"Seeking the Sky",
"Stars in the Sky",
"City Pollution"
] | null | A | |
mmlu_stem | mmlu_stem_11086 | When Emily Beardmore first heard that a trip was being planned by the biology class at Windsor High School, she thought about how much fun it would be. "I thought it would be a really good experience to go with other friends and teachers to another country in an environment other than a vacation environment," the 17-year-old girl said. A few months later, Emily got her chance when she and 14 of her classmates, along with biology teacher Tamara Pennington went to Costa Rica for eight days in late May. "It was not just a tour," said Pennington, who organized the trip. "You can go any place in the world on just a tour. This one was really working with the sea turtles and practicing conservation . It just seemed like the perfect science field trip for kids who think they want to get into science to see what it's really like to be out in the field and enjoy themselves." Emily said her time on the turtle program, which was the focus of the trip, was "crazy." "We were walking on the beach at night and you can't see anything--just see a big black dot." She said with a laugh. "I was not expecting the turtles to be that big." The turtles are leatherback turtles, which are becoming extinct because their eggs are used as food. "When they would move their legs while laying their eggs they were really hard to control because they were a lot more powerful than you would imagine," Emily said. Once the eggs were collected, the students took them back to a hatchery and dug holes to copy the hole the mother turtle had made and then buried the eggs for the 60 days needed to hatch. "The experience was so cool," Emily said. "You go to another country to see what their culture is like and learn what their everyday lives are like. It made me really want to help out my mom a lot more than I do, and value what I have." From what Emily said on her turtle program, we know that _ . | [
"she was afraid of walking on the beach at night",
"she didn't dare to catch the powerful turtles",
"she had thought turtles were small animals",
"she got crazy at the sight of turtles at night"
] | null | C | |
mmlu_stem | mmlu_stem_21999 | Water will become vapor quicker in | [
"Jupiter",
"Earth",
"Mercury",
"Neptune"
] | null | C | |
mmlu_stem | mmlu_stem_18268 | A girl signals her friend by shining a flashlight on a mirror. Her friend can see the signal because | [
"heat energy can be transferred from one object to another",
"mechanical energy can be transferred from one object to another",
"sound energy can be reflected from one object to another",
"light energy can be reflected from one object to another"
] | null | D | |
mmlu_stem | mmlu_stem_21659 | Waxy leaves are used by some plants for what? | [
"Sodium Chloride",
"Gold",
"Keeping hyrdrogen dioxide",
"Barium"
] | null | C | |
mmlu_stem | mmlu_stem_12934 | Each summer,you hear news that some sports players are sent to hospitals because it is too hot. Our bodies can't be outside in the sun for a long time. So in hot summers,be careful about playing sports outside. Firstly,to play sports safely in hot weather,you must drink water. Sports drinks are great for athletes,but they have so much sugar that they'll dehydrate you more. However,drinking a few bottles of sports drinks will be good for you. Secondly,be sure to take enough breaks to let your body rest. If your coach doesn't let you take enough breaks in the heat,don't wait until you feel uncomfortable. Just be honest with your coach when you need breaks. Thirdly,when you have a break,don't sit in the sun. With the sun beating down on you,you'll only heat up and sweat more. Take a seat under a tree,or even better,go indoors for a little while. Cooling yourself down can help you stay active longer. Fourthly,remember that the earlier in the day you start your exercise,the cooler it will be. If you can start practice before the sun comes up,you have a few good hours to practise in the cool hours of the morning. Also,the earlier you practise,the earlier you can finish the exercise. If you need more practice time,come back to the field later in the evening,when the sun is setting. Last but not least,you should watch what you eat. Eat food which is high in water,starch and carbonhydrate ,but be sure to get a good balance in your diet. As long as you pay attention to the above,playing sports safely in the heat isn't a difficult thing. Which of the following is true according to the passage? | [
"Sports drinks are good for you with no harm.",
"You need to tell your coach when you feel tired.",
"Sitting under a tree is better than staying indoors.",
"Eating lots of sugar is necessary for sports safely."
] | null | B | |
mmlu_stem | mmlu_stem_3136 | Between 1996 and 2010, according to a study published in 2012, the use of computed tomography (CT) scans nearly increased by three times as much, from 52 scans per 1,000 patients to 149 scans per 1,000 patients. And those images certainly provided valuable information to help doctors diagnose hidden conditions that wouldn't have been possible without the added insight. But CT scans produce those detailed images using small amounts of radiation, and while the risk of that exposure is small, on a population level, increased reliance on the scans could drive a slight bump in cancer risk from CT. That's exactly what the latest study, published in the British Medical Journal, found. It's the largest study to date -- involving 10.9 million Australians born between 1985 and 2005. A team of researchers from Australia and Europe studied the cancer rates of Australian patients from birth to 19 years old who had CT scans in early childhood, and compared them to those who did not receive the scans. Most of the cases were followed for 10 to 17 years, and by the end of the study period, 3,150 of the 680,000 patients exposed to CT scans during childhood and young adulthood developed cancer and 57,542 of the remaining participants, who were not exposed, developed cancer. Those who were scanned had a 24% greater risk of cancer than those who did not receive them, with the risk increasing by 16% for each additional CT. The risk was highest for children who received scans before age five; they showed a 35% increased chance of developing a cancer during the study period than those who weren't scanned at this age. That research is still ongoing, however, and in the meantime, doctors and patients are left to find the delicate balance between how necessary scans are to diagnose disease, and their potential risk of causing cancer, which, most experts say, is still very small. "All parties, including patients and families, need to work together to make sure that CT scans are limited to situations where there is a definite clinical indication," the authors write. Only then will the benefits, they say, outweigh the risks of exposure. Among the following, who will face the highest cancer risk after CT scans? | [
"A one-year-old baby.",
"A seven-year-old student.",
"A fourteen-year-old teen.",
"A twenty-year-old adult."
] | null | A | |
mmlu_stem | mmlu_stem_3872 | Do your parents smoke? Where do they smoke - outside, at work or at home when you are around? According to a survey published in the journal Academic Pediatrics, an alarming number of US parents are still risking their children's lives by smoking in front of them. Half of all children aged 6 to 19, even those with asthma , have been exposed to second-hand smoke in the country, reported Reuters. "It's well known that smoking kills, but many smokers still don't realize the damage their smoke causes to those around them," Dame Sally, Chief Medical Officer for England, was quoted by the Independent as saying. Tobacco smoke contains more than 7,000 chemicals, hundreds of which are poisonous. About 70 of them can cause cancer, not to mention other diseases, according to the US Centers for Disease Control and Prevention. What's most scary is that there is no safe level of contact with second-hand smoke---even "low-level" exposure can be harmful to one's health. And "low-level" means when a parent or family member smokes in another room or even outside. While second-hand smoke can be harmful to people of all ages, children face a greater risk than adults: they have smaller lungs; they breathe more quickly; and they have less developed immune systems. Also, young children have little control over their surroundings. Babies can't move to another room because the air is smoky. They depend on the adults in their lives to make sure that their environments are safe. Recent years have seen second-hand smoke exposure drop---but for adults rather than kids, because policies have been started around the world to ban smoking in public places such as offices, bars and restaurants. However, "Children tend to be exposed to second-hand smoke in homes and cars, and these places are not included in most laws and policies," Amy Ferketich, a researcher at The Ohio State University, US, told Reuters. So what can we do to limit children's exposure to second-hand smoke? Parents should stop smoking for good. But if they can't, they should never smoke---or let others smoke---around their children. Which of the following is TRUE according to the article? | [
"Half of the children ages 9 to 18 in the US have parents who smoked at home.",
"Most smokers in the US don't care about the effects that smoking can have on those around them.",
"Dame Sally believes many parents who smoke in front of their kids have no idea of the damage that they are doing.",
"Hundreds of c... | null | C | |
mmlu_stem | mmlu_stem_2001 | Every year, green sea turtles migrate approximately 2000 km to reproduce. This migration is an example of | [
"a learned behavior.",
"an instinctive behavior.",
"a response to crowding.",
"an escape from predators."
] | null | B | |
mmlu_stem | mmlu_stem_223 | Which of the following properties of a substance is conserved during thermal expansion? | [
"mass",
"volume",
"shape",
"distance between particles"
] | null | A | |
mmlu_stem | mmlu_stem_1018 | Charisma has a goldfish she keeps in a tank. She planted several underwater plants in the bottom of the tank. How are the goldfish and the plants in the tank similar? | [
"Both add oxygen to the water.",
"Both perform photosynthesis.",
"Both are made up of cells.",
"Both eat food."
] | null | C | |
mmlu_stem | mmlu_stem_18407 | Most of the bacteria in a forest ecosystem are best classified as which of the following types of organisms? | [
"consumers",
"decomposers",
"predators",
"producers"
] | null | B | |
mmlu_stem | mmlu_stem_3916 | Nursing at Beth Israel Hospital produces the best patient care. If we are to solve the nursing shortage. hospital administration and doctors everywhere would do well to follow Beth Israel's example . At Beth Israel each patient is assigned to a primary nurse who visits at length with the patient and constructs a full-scale health account that covers everything from his medical history to his emotional state. Then she writes a care plan centered on the patient's illness but which also includes everything else that is necessary. The primary nurse stays with the patient through his hospitalization. keeping track with his progress and seeking further advice from his doctor. If a patient at Beth Israel is not responding to treatment. it is not uncommon for his nurse to propose another approach to his doctor. What the doctor at Beth Israel has in the primary nurse is a true colleague. Nursing at Beth Israel also involves a decentralized nursing administration; every unit is a self-contained organization. There are nurse-managers instead of head nurses; in addition to their medical duties they do all their own hiring and dismissing, employee advising, and they make salary recommendations. Each unit's nurses decide among themselves who will work what shifts and when. Beth Israel's nurse-in-chief ranks as an equal with other vice presidents of the hospital. She is also a member of the Medical Executive Committee. which in most hospitals includes only doctors. The author's attitude towards the nurse system at Beth Israel Hospital is _ | [
"negative",
"neutral",
"critical",
"positive"
] | null | D | |
mmlu_stem | mmlu_stem_1470 | Tim Goes To The Beach Today was exciting. Tim's mom was taking him and his little sisters, Rebecca and Georgia, to the beach! They were going to go swimming. Then they were also going to have a picnic lunch on the beach. After their picnic lunch, Tim's mom was going to light a campfire and they were going to eat toasted marshmallows. Tim and his mom and his two little sisters hopped into the van. His little sisters were both very blonde and pretty little girls. They were only 4 years old. Because they lived in the city, they had a short drive to get to the beach. To pass the time, Tim played Eye Spy with his mother as they drove for a bit. Once they had gotten bored with Eye Spy, they played 20 Questions. Tim would think of something, and his mother would ask him questions to try and guess what it was. When they got to the beach, it was warm, and sunny. The salt water was warm, and the waves lapped up on the shore. It made a lovely noise. It also felt great on Tim's toes, and his little sisters giggled when the waves hit them. When they had had their fill of swimming, Tim's mom had them sit down to a nice dinner. They ate and ate. They ate macaroni salad. Then they ate some cold chicken. They also had lemon pie for dessert. Tim's mom started a fire, and they spent the rest of the evening as the sun set eating toasted marshmallows and singing campfire songs. Tim thought it was a very good day. Did Tim do anything to pass the time in the van during the trip? | [
"Tim asked his sisters questions in the van.",
"Tim played Eye Spy, and 20 Questions with his mother in the van.",
"Tim did not do anything to pass the time.",
"Tim played Eye Spy with his sisters in the van."
] | null | B | |
mmlu_stem | mmlu_stem_16641 | Mr Baker worked in a big factory. He was busy all the time and had little time to rest. One summer, he decided to go to the sea to spend his holidays. One afternoon, it was very hot. Mr Baker came into a restaurant, sat at a table and wanted to drink. Just then, an old man came up to him and said, "How do you do, sir?" "How do you do?" Mr Baker asked the old man to sit next to him. "Have you been here before?" "No, I haven't." "You look lonely, don't you?" said the old man. "Let's have a bet, shall we?" It interested Mr Baker, "But what shall we bet on?" "I can bite my left eyeball," said the old man, "I can bet you five dollars." Mr Baker didn't believe and passed $5 on the table. The old man took out his glass eyeball, put it into his mouth and bite it. Mr Baker had to give his money. "It doesn't matter young man," the old man said. "I'll give you a chance to win the money back. I can also bite my right eye. I'll bet you $10." "I'm sure he's able to see. And I must win his money," he thought. So he took out ten dollars from his wallet. But he was very surprised, the old man took out his false teeth and bit his right eye with it. Then he put the money into his pocket and went away quickly. The old man was blind in _ . | [
"both eyes",
"neither eye",
"the right eye",
"the left eye"
] | null | D | |
mmlu_stem | mmlu_stem_370 | In humans, a trait can be determined by one pair or many pairs of | [
"genes",
"microbes",
"cells",
"organs"
] | null | A | |
mmlu_stem | mmlu_stem_22404 | A person with a pet amphibian will likely feed it | [
"deer",
"wax",
"steak",
"meal worms"
] | null | D | |
mmlu_stem | mmlu_stem_12820 | Mr. Gao lives in a town. When he was twenty-five, his son was born. He calls him Gao Ling. The little boy is clever. He and his wife love him very much. It's September 1st today. A new school year begins. Gao Ling is happy and wears his most beautiful clothes. He's going to school with his new bag. "Let me take you to school, dear." said Mrs. Gao. "Thank you, Mummy," said the boy. "The school is not far from here.I can go there myself." At school a teacher met the little boy and asked, "What's your name, my little friend?" "Gao Ling, sir." answered the boy. "How old are you?" "Six, sir." "What's your father's name?" "Gao Daling, sir." "How old is he?" "He is six, too, sir." "Oh," the teacher said in surprise. "Is he as old as you?" Yes, sir," said the boy. "He became a father only on the day when I was born." Gao Ling went to school _ | [
"by car",
"on foot",
"by train",
"by bike"
] | null | B | |
mmlu_stem | mmlu_stem_6156 | Al Ossinger,an experienced mountain guide,knew it was time to leave Longs Peak in Colorado's Rocky Mountain National Park,and get off'quickly.The sky had turned threatening dark,and his ice ax at times gave out upset sounds.Suddenly,as Ossinger was crossing a large mass of rock,both hands pressed against it for balance,there was a roar,a flash of light and an electric current charged through his arms. "In that second. I thought 1 was finished,"he said,"Then I realized 1 was still there--the jolt hadn't knocked me off.My body and legs were all right,but my arms were paralyzed from the shoulder down.''Fortunately Ossinger was able to continue down and soon the feeling began to return to his shoulders,upper arms,and,two hours later,his fingertips.Ossinger was a lucky man. A single stroke of lightning,which is usually three to four miles long,travels at speeds of up to 100,000 miles per second.In a single flash,it can carry 100 million volts of electricity and reach a temperature of 55,000 degrees Fahrenheit,five times hotter than the surface of the sun.During its brief life span,lightning carries enough energy to power a 100-watt light bulb for as long as three months.If you find yourself unlucky enough to be near lightning's path,you could suffer a direct hit,sending electrical current though your body for some 5 00 milli-seconds.Because of the short duration,severe burns aren't common and the resulting burns are usually superficial . According to the national Weather Service,more people have been killed by lightning in the United States during the past 30 years,an average of 87 a year-than by either tornadoes or hurricanes,484 people were injured in 1994 alone.These"swords from the sky" are also responsible for an estimated$100 million to$300 million of property damage a year.During the 1980s an average of 5502 wildfires a year were sparked by lightning on national forest lands alone. Earth is struck by at 1east 100 of these flashes every second-more than 8.6 million strikes a day.For all its destructive power,lightning has its good sides too.It's likely that humans discovered fire from some early lightning-sparked flames.And all that activity above the earth may help create ozone ,which protects us from the sun's harmful rays.Lightning dancing across a summer night sky is a force to be respected and appreciated-from a distance. Electrical lightning is called"swords from the sky"to mean _ . | [
"it looks 1ike swords",
"it can kill people",
"it is sent by God",
"it comes naturally"
] | null | B | |
mmlu_stem | mmlu_stem_13374 | Sarah was ill, she went to see the doctor. " Doctor, I'm not feeling well," she said. " Every time I do my homework, I feel tired. If I go to school on foot, I have to sit down and rest for ten minutes." The doctor looked at her carefully. At last he said, " Nothing much. But I'm afraid you are eating too much." "I don't understand, what do you mean ? "asked Sarah. "I mean you eat too much food," said the doctor. " Oh! You mean I'm too fat. That's a problem." Said Sarah. "What should I do If I don't want to be heavy !" " The answer is easy," said the doctor. " If you want to be thin and healthy, you shouldn't eat a lot of food and you also should do much exercise." Sarah went to school _ . | [
"by bike",
"by bus",
"by car",
"on foot"
] | null | D | |
mmlu_stem | mmlu_stem_241 | Which is an example of a chemical reaction? | [
"nails rusting",
"glass melting",
"sugar dissolving",
"alcohol vaporizing"
] | null | A | |
mmlu_stem | mmlu_stem_20448 | A person wants to play a song out yet lacks an instrument, so they can | [
"think about a piano",
"hold a paper towel tube",
"flick a taut rubber band",
"look at a table"
] | null | C | |
mmlu_stem | mmlu_stem_11934 | Three years ago, five parrots were set free in a wild place of Arizona, thousands of miles from the Channel Islands in Jersey where they had been looked after by zookeepers. No evolutionary strategies informed them how to behave in this new landscape of mountainous pine forest unoccupied by their kind for 50 years. To the researchers' surprise, they failed to make contact with a group of wild parrots imported from Mexico and set free at the same time. Within 24 hours the reintroducing ended in failure, and the poor birds were back in cages, on their way to the safety of the Arizona reintroduction programme. Ever since then, the programme has enjoyed great success, mainly because the birds now being set free are Mexican birds illegally caught in the wild, confiscated on arrival north of the border, and raised by their parents in the safety of the programme. The experience shows how little we know about the behaviour and psychology of parrots, as Peter Bennett, a bird researcher, points out: "Reintroducing species of high intelligence like parrots is a lot more difficult. People like parrots, always treating them as nothing more than pets or valuable 'collectables'." Now that many species of parrot are in immediate danger of dying out, biologists are working together to study the natural history and the behaviour of this family of birds. Last year was an important turning point: conservationists founded the World Parrot Trust, based at Hayle in Cornwall, to support research into both wild and caged birds. Research on parrots is vital for two reasons. First, as the Arizona programme showed, when reintroducing parrots to the wild, we need to be aware of what the birds must know if they are to survive in their natural home. We also need to learn more about the needs of parrots kept as pets, particularly as the Trust's campaign does not attempt to discourage the practice, but rather urges people who buy parrots as pets to choose birds raised by humans. The reintroducing experience three years ago shows that man-raised parrots | [
"can find their way back home in Jersey",
"are unable to recognize their parents",
"are unable to adapt to the wild",
"can produce a new species"
] | null | C | |
mmlu_stem | mmlu_stem_14818 | One bright and sunny day, I felt like fishing.So I packed what I needed...fishing stick, hooks , and worms for bait .When I reached the lake, I put a worm on the hook and threw the line in and waited for the fish to bite.I was disappointed when I did not catch anything after waiting for three hours.I pulled in the line.To my surprise, there was a small fish at the end of the line.The fish was so small that I did not feel any pulling on the line.I was even more surprised when the fish started to talk, "Let me go or I will turn you into a frog!" I was so worried that I just looked at it.The next moment, I was already a frog... "Help! Help!" I shouted loudly.When I woke up, I found I fell down the ground. When I went to fish, the weather is _ . | [
"rainy",
"cloudy",
"nice",
"windy"
] | null | C | |
mmlu_stem | mmlu_stem_2950 | Paying a higher price than usual for a ticket to see a film in 3D is the annoyance of many a cinema-goer's life. But there may be a benefit to doing so, as a study has found that 3D films exercise the brain and improve short-term functioning in a similar way to brain-training tests. The research found that people who watched a movie in 3D improved cognitive skills, compared to those who watched it in 2D. The research was led by neuroscientist Dr Patrick Fagan from Goldsmiths University in London. More than 100 people took part in the experiment, where participants watched Disney filmBig Hero 6in either standard format or RealD 3D. They also carried out a brain-training-style test before and after seeing a section from the film. The test covered memory, reaction times and cognitive function and the results were compared later. According to the research, which was carried out in partnership with science group Thrill Laboratory, participants experienced a 23 percent increase in cognitive processing, as well as an 11 percent increase in reaction times. Dr Fagan said that the results showed enough of an improvement in brain function to suggest that 3D could play a part in improving brain power in the future. "These findings are more significant than you might think," he said. "It is a fact that people are living longer and there is a noticeable decline in cognitive brain function in old age which can worsen future quality of life. There has never been a better time to look at ways to improve brain function. The initial results of this study show that 3D films may potentially play a role in slowing this decline." A second part of the experiment involved those watching the film being fitted with headsets that scanned brain activity and this too showed heightened activity when watching 3D. According to the results, participants were seven percent more engaged with what they were watching, adding to argument that 3D movies are more like watching real-life--something Professor Brendan Walker from Thrill Laboratory agreed with. "As Professor Brendan Walker's test concluded, 3D films are more attractive and heighten the senses -- this, in turn, makes the brain run at quicker speeds," Dr Fagan said. The text is most likely to appear in _ . | [
"a sports newspaper",
"a biology textbook",
"a science magazine",
"a film review"
] | null | C | |
mmlu_stem | mmlu_stem_10590 | "Mobile phones killed our man,"screamed one headline last year. Also came claims that an unpublished study had found that mobile phones cause memory loss. And a British newspaper devoted its front page to a picture supposedly showing how mobile phones heat the brain. For anyone who uses a moblie phone, these are worring times. But speak to the scientists whose work is the focus of these scared and you will hear a different story. What we do have, however, are some results suggesting that mobile phones'emission have a variety of strange effects on living tissue that can't be explained by the general radiation biology. And it's only when the questions raised by these experients are answered that we'll be able to say for sure what moblie phones might be doing to the brain. One of the odd effects comes from the now famous"merrory loss" study. Alan Preece and his colleagues at the prefix = st1 /UniversityofBristolplaced a device that imitated the microwave emission of mobile phones to the left ear of volunteers. The volunteers were all goood at recalling words and pictures they had been shown on a computer screen. Preece says he still can't comment on the effects of using a mobile phone for years on end. But he rules out the suggestion that mobile phones have an immediate effect on our cognitive abilities."I'm pretty sure there is no effect on short-term memory," he says. Another expert, Tatterasll, remarked that his latest findings have removed fears about memory loss. One result, for instance, suggests that nerve cell synapses exposed to microwaves become more----rather than less-----receptive to under-going changes linked to the memory formation. It would be an even happier outcome if microwave turned out to be good for you. It sounds crazy, but a couple of years ago a team led by William Adey at the Veterans Affairs Medical Center in California, found that mice exposed to microwave for two hours a day were less likely to develop brain tumours when given a cancer-causing chemical. So should we forget about mobile phone radiation causing brain tumours and scrambling our minds? "If it doesn't certainly cause cancer in animals and cells, then it probably isn't going to cause cancer in humans,"says William. And while there's still no evidence that mobile phone does mangle your memories or give your cancer, the _ is:Don't panic. What is the attitude of Preece on the suggestion that mobile phones have an immediate effect on our congnitive abilities? | [
"Positive",
"Negative",
"Unknown",
"Wait and see"
] | null | B | |
mmlu_stem | mmlu_stem_3029 | _ In order to reduce air pollution and oilshortages, automobile manufacturers have announced their plans to develop hybrid vehicles for the Chinese market. Toyota's hybrid car Prius will be ready to drive in China this week. Let's have a look at the new car. Any vehicle is a hybrid when it combines two or more sources of power. Hybrid cars run off a rechargeable battery and gasoline. Hybrid cars have special engines, which are smaller than traditional gasoline engines. They run at 99 percent of their power when the car is cruising . A specially designed battery motor provides extra power for running up hills or when extra acceleration is needed. Step into a Prius, and turn on the engine. The first thing you notice is how much quieter it is than a traditional car. At this point, the car's gasoline engine is dormant . The electric motor will provide power until the car reaches about 24 km/h. If you stay at a low speed, you are effectively driving an electric car, with no gasoline being used, and no waste gas gives off. The onboard computer makes the decision about when to use a gas engine, when to go electric, and when to use a combination of the two. If you go over 24 km/h, when you step on the gas pedal , you are actually telling the computer how fast you want to go. The electronic motor recharges automatically using a set of batteries. When driving at high speed, the gasoline engine not only powers the car, but also charges the batteries. Any time you use the brake, the electric motor in the wheels will work like a generator and produce electricity to recharge the batteries. As a consequence, the car's batteries will last for around 200,000 miles. What is the most important feature of hybrid cars? | [
"They are powered by both a rechargeable battery and gasoline.",
"They are much quieter than traditional cars.",
"They only use 99 percent of their power to run up hills.",
"They have smaller engines than traditional gasoline ones."
] | null | A | |
mmlu_stem | mmlu_stem_5636 | Technology and the present generation of kids go hand in hand. Taking advantage of this factor, Lim Hojoon, the designer from South Korea, has come up with an educational gadget especially for children. Kidget, as the name suggests, is a combination of two words - kid and gadget. This kid-friendly gadget has various uses. When your child is in a mood to read, it takes the form of a storybook. When the mood is to draw and color this wonder gadget turns into a perfect canvas . Your child can freely give color to all his/her imaginations. Should he or she wish to have some fun, see this device change into a musical instrument. You too would enjoy doing activities with your loved one using this gadget. This touch screen device will definitely prove to be an ideal friend. As many parents agree, in this age of technological advancements it is much easier to introduce children to new gadgets than adults. While many adults refrain from trying out something new, kids are more than prepared to take the leap. Keeping this fact in mind, Kidget is the perfect gift for the child of the 21st century. You will be surprised to see how fast your little one gets acquainted with the device. You might even find yourself lagging behind at times. Kidget has another hidden advantage. It helps take the load off young shoulders. With three things rolled into one, a child has much less books, stationary items and related goods to carry. It comes with a promise to make life simpler for kids. Not only is it simple to use but also easy to carry along. The stylish protective case comes with a belt attached to it. Children up to 14 years of age, the targeted audience, enjoy the freedom that comes with it. We can infer from the text that Kidget _ . | [
"has both advantages and disadvantages",
"hasn't been put into use",
"needs to be further improved",
"is a perfect gift for kids"
] | null | D | |
mmlu_stem | mmlu_stem_11223 | The Lunar New Year, which starts in late January this year, is the most important festival for Chinese people as most of them drop any business at hand to go back to their hometown to see their families. It is a tradition that has been cherished since ancient times, but as social mobility increases in modern times, the road to family reunions has become very uneasy. It is not the higher travel costs, nor the expected big spending on gifts and other festival items, but the train ticket that has driven many travelers mad. I've heard some colleagues complain that they have tried every means to secure a train ticket, only to find it a mission impossible. Some of them have turned to the latest software to aid online booking; others have sought help from friends to increase the possibility of successful booking. No doubt chunyun, the Spring Festival travel season, is the largest-scale annual human migration in the world. Last year, 220 million passengers traveled by train during the Spring Festival season, which usually lasts 40 days. It is a huge jump from 10 years ago, when the number was 128 million. With the big sudden increase in demand, the railway company has increased investment in railway construction; still, it cannot bridge the supply gap, leading to fierce public complaints and criticism. Admittedly, it is almost impossible for the railway company to suddenly improve its capacity to meet the explosive demand during the Spring Festival holiday. Moreover, any temporary increase in capacity would become unnecessary after the holiday and mean great commercial losses during the off season. What the company can reasonably do is gradually improve its capacity while focusing on better distribution of its existing resources during the special peak season. At any rate, however, the problem cannot be solved overnight. Compared with ten years ago, the percentage of passengers last year increased by _ . | [
"40%",
"58%",
"71%",
"83%"
] | null | C | |
mmlu_stem | mmlu_stem_13821 | Henry: I find the Internet is very good for shopping. I use more and more for buying books and CDs, and I even bought some clothes over the Internet. The other thing I can do is to book travels over the Internet. I booked a cheap flight once. It was very easy, and it was really good. David: I use the Internet for games. I play chess with people all around the world. Last night I had a game with someone from Japan. I also download games from the Internet, so I can have any game I want. Peter: I use the Internet for anything I need to help me with my schoolwork. I use the online dictionaries, encyclopedias and magazines. It's great because I can download pictures or articles and use them to help my homework. It's very easy to use and it's free, so I like it. Tony: Well, the main thing I use the Internet for is to e-mail. I usually write to my customers by e-mail, and my customers answer me by e-mail, too. We probably send and receive four or five hundred e-mails a month. But of course, I also use e-mails to keep in touch with friends and family. My daughter is in Australia and we send e-mails to each other every day. Which of the following is NOT true? | [
"Henry had an experience of using the Internet to book a cheap flight.",
"David had a game with a Japanese over the Internet one night.",
"Tony often e-mails to his customers, friends and family.",
"Peter needs to pay for what he gets from the Internet."
] | null | D | |
mmlu_stem | mmlu_stem_281 | In Costa Rica a small tree, the acacia, provides shelter and food for ants. The ants protect the acacia by removing other insects and vines that might harm it. Which term best describes the relationship between the acacia and the ants? | [
"competition",
"mutualism",
"parasitism",
"predation"
] | null | B | |
mmlu_stem | mmlu_stem_17777 | Which activity is an example of a chemical change? | [
"dissolving table salt in water",
"hammering aluminum into thin sheets",
"melting gold to make jewelry",
"burning wood to produce ashes"
] | null | D | |
mmlu_stem | mmlu_stem_3667 | Lipitor is a prescription medicine. Along with diet and exercise, it lowers "bad" cholesterol in your blood. It can also raise "good" cholesterol. Lipitor can lower the risk of heart attack in patients with several common risk factors, including family history of early heart disease, high blood pressure, age and smoking. WHO IS LIPITOR FOR? Who can take LIPITOR: * People who cannot lower their cholesterol enough with diet and exercise. * Adults and children over 10. Who should NOT take LIPITOR: * Women who are pregnant, may be pregnant, or may become pregnant. Lipitor may harm your unborn baby. * Women who are breast-feeding. Lipitor can pass into your breast milk and may harm your baby. * People with liver problems. POSSIBLE SIDE EFFECTS OF LIPITOR Serious side effects in a small number of people: * Muscle problems that can lead to kidney problems, including kidney failure. * Liver problems. Your doctor may do blood tests to check your liver before you start Lipitor and while you are taking it. Call your doctor right away if you have: * Unexplained muscle pain or weakness, especially if you have a fever or feel very fired. * Swelling of the face, lips, tongue, and/or throat that may cause difficulty in breathing or swallowing. * Stomach pain. Some common side effects of LIPITOR are: * Muscle pain. * Upset stomach. * Changes in some blood tests. HOW TO TAKE LIPITOR DO: * Take Lipitor as prescribed by your doctor. * Try to eat heart-healthy foods while you take Lipitor. * Take Lipitor at any time of day, with or without food. * If you miss a dose, take it as soon as you remember. But if it has been more than 12 hours since you missed dose, wait. Take the next dose at your regular time. Don't: * Do not change or stop your dose before talking to your doctor. * Do not start new medicines before talking to your doctor. What is a major function of Lipitor? | [
"To help quit smoking.",
"To control blood pressure.",
"To improve unhealthy diet.",
"To lower \"bad\" cholesterol."
] | null | D | |
mmlu_stem | mmlu_stem_10643 | Doctors sometimes prescribe light therapy to treat a form of depression in people who get too little morning sun. But too much light at other times may actually cause such mood disorders. Long-lasting exposure to light at night brings depression, a new study finds, at least in animals. The new data confirm observations from studies of people who work night shifts, says Richard Stevens of the University of Connecticut Health Center. Mood disorders join a growing list of problems, including cancer, obesity and diabetes--that can occur when light throws life out of balance by disturbing the biological clock and its timing of daily rhythms. www.ks5u.com In the new study, Tracy Bedrosian and Randy Nelson of Ohio State University exposed mice to normal light and dark cycles for four weeks. For the next four weeks, half of the mice remained on this schedule, and the rest received continuous dim light throughout their night. Compared with mice exposed to normal nighttime darkness, those getting dim light at night lost their strong preference for sweet drinks, "a sign they no longer get pleasure out of activities they once enjoyed, " Bedrosian says. In a second test, mice were clocked on how long they actively tried to escape a pool of water. Those exposed to night lights stopped struggling and just floated in the water, a sign of "behavioral despair",10 times as long as the mice that had experienced normal nighttime darkness. All symptoms of depression disappeared within two weeks of the mice returning to a normal light-dark cycle, the researchers report. The scientists also could quash the behavioral symptoms by injecting the brains of animals with a drug that prohibits the activity of certain molecules linked with human depression. This finding further suggests that light at night may cause something related to depression. Human studies linking nighttime light and mood disorders are important but can't easily detect molecular underpinnings as animal studies can,says George Brainard of Thomas Jefferson University. The new work, he says, suggests that the change of the biological clock by light at night can be "an extremely powerful force in regulating biology and behavior. " After being exposed to continuous nighttime light, the mice _ . | [
"changed their preferences",
"escaped from the water more eagerly",
"showed less interest in their favorites",
"remained active as before"
] | null | C | |
mmlu_stem | mmlu_stem_11433 | Most people have heard the sound of bees among flowers. Bees live almost everywhere in the world except in the Arctic areas. Many kinds of agriculture depend on these small, social insects. Without bees, fruit and nut growers as well as many other farmers would not have a crop. There are more than 20,000 kinds of bees. But only honey bees make enough honey for people to use. Honeybees are highly-organized social insects. They work together in a group, called a colony . Each colony lives in a hive . It contains one queen bee -- she lays all the eggs from which the members of the colony come. Each colony has only a few hundred males, called drones. The majority of all bees in a colony are workers, which are all females. Bees even have a special stomach, called a honey stomach, which is used to store sweet fluid that the bees gather from flowers. Bees also have long hairs on their body and legs. These hairs capture pollen as bees go from flower to flower. Some of the pollen is taken back to the hive. Some, however, is passed to the next flower. This is how many plants are fertilized. Pollen is the reproductive material of plants. Many important agricultural crops depend on bees for fertilization. Inside their hives, bees store sweet liquid from flowers and pollen as well. They may even gather sweet liquid from some other kinds of insects. These kinds of sweet liquid are also stored in the hive. Bees make honey through a process. They add liquid from their own mouths to sweet liquid into simple sugar. As the honey is stored, it dries. It becomes thicker and darker. Although bees are often thought of as honey makers, they provide a surprising number of products. Also, their greatest economic value is in fertilizing crops-not in making honey. The most valuable thing honeybees do for people is in _ . | [
"making honey",
"fertilizing crops",
"making flowers grow better",
"producing pollen"
] | null | B |
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