Problem: Write a multi-choice question for the following article: Article: There was good news last week for people who struggle to get eight hours of sleep a night: they may not need so much shut-eye after all. Researchers from UCLA and elsewhere looked at sleep habits of remote hunter-gatherers in Tanzania, Namibia and Bolivia -- groups with pre-industrial lifestyles whose sleep patterns are believed to reflect those of ancient humans. The researchers found that, on average, members of each group sleep a bit less than six and a half hours a night. The study, published in the academic journalCurrent Biology, indicates that "natural" sleep is less than eight hours a night and that modern society's numerous electronic distractions aren't necessarily to blame for people getting just six or seven hours of sleep. "The story that often gets out is that if you sleep for less than seven hours, you're going to die early," he told me. "That's not true." Yet Americans are addicted to getting more sleep -- and on turning to medical shortcuts to help them. According to the Centers for Disease Control, as many as 70 million U.S. adults suffer from sleep disorders or sleeplessness. Only a third of Americans get the government's recommended seven to nine hours of sleep a night. About 9 million American adults use sleeping pills to help get a good night's rest, the CDC found. Siegel said the number of people relying on medicines "has gone up rather rapidly since then." Industry consulting firm GlobalData estimates that worldwide sales for sleeplessness medicines will run about $1.4 billion next year and reach $1.8 billion by 2023, recovering from lower sales in recent years because of cheaper generics hitting the market. Dr. Roy Artal, a sleep specialist in West Los Angeles, said it's understandable that busy people in today's go-go world would turn to medicines to speed up the sleep process. But all they're doing is building a reliance on powerful drugs for relatively little improvement. "There's no magic pill that makes us sleep when we want and wake up when we want," Artal said. "The effects...

A: Question: Jerome Siegel believes that _ .Options:A we need to take sleeping pills to improve sleepB modern electronic products do harm to a good sleepC those who sleep for less than 7 hours will die earlyD there is nothing wrong with a 6 or 7 hours' sleepAnswer:D

Problem: Write a multi-choice question for the following article: Article: Mrs.Ohama spoke to the graduates of Martin Luther King Jr.High School on Saturday in her only high school commencement speech this year. The ceremony took place in the gymnasium of Tennessee State University The first lady told the 170 graduates that she spent too much of her time in college focusing on academe achievements.While her success in college and law school led to 8 good job, she said, she ended up focusing on public service. "My message to you today is that don't waste a minute living someone else's dream: she said. It takes lot of real work to discover what brings you joy and you won't find what you love simply by checking mailboxes or surfing the net. She said MLK reminded her of her own high school experience in Chicago."My No.1 goal was to go to a high school that would push me and challenge me," she said."I wanted to go somewhere that would celebrate achievement.Unfortunately, schools like this don't exist for every kid." she said."You are blessed" The first lady told graduates that failure may be 8 part of their college lives and careers, and that how they respond determines what they will become. "That's when you find out what you're really made of in those hard times," she said."But you can only do that if you're willing to put yourself in position where you might fail." Overcoming difficulties has been the mark of many great people, she said, "Oprah was demoted from her first job as news reporter, and now she doesn't even need a last name," she said of media giant Oprah Winfrey "And then there's this guy Barack Obama, I could take up a whole afternoon talking about his failures He lost his first race for Congress",the first lady Joked, "and now he gets to call himself my husband"

A: Question: Where can you probably find this text?Options:A In a politics bookB On news websiteC In 8 graduation paperD On Mrs.Obama's blogAnswer:B

Problem: Write a multi-choice question for the following article: Article: Nowadays, there is a heated debate on whether pollutants should be cleaned in the air. Cleaning up the air, while good for our lungs, could make global warming worse. And the pollutants still go up around the air, along with carbon dioxide. These pollutants are called aerosols and they include soot as well as mixtures of nitrogen and sulfur and other stuff into the air. Natalie Mahowald, a climate researcher at Cornell University, says so far, scientists have mostly tried to understand what those aerosols do while they're actually in the air. "There are so many different kinds of aerosols," she says. "Some warm and some cool. But in fact, humans are giving out a lot of extra aerosols, and they tend to cool for the most part." The aerosols reflect sunlight back into space, or keep us cool. But it turns out that's not all they do. These aerosols also influence how much carbon dioxide gets drawn out of the air by plants on land and in the sea. "They can add nutrients, for example, to the oceans or to the land," Mahowald says. "But also while they're in the atmosphere they can change the climate, and thus that also can influence the amount of carbon, the land or the ocean can take up. So there are quite a few different ways that aerosols can act on each other." Mahowald's results suggest that reducing those pollutants could be an even bigger problem than realized, when you consider that aerosols help remove carbon dioxide from the air by encouraging plant growth. Hard numbers on this effect are highly uncertain at the moment, but this could turn out to be quite significant. And studying it is not easy because the effects aren't well understood. For example, nitrogen can be a fertilizer , but it can stop plant growing when nitrogen comes out of the air in acid form. Right now it seems like we're much more likely to clean up aerosol pollution, while increasing the amount of carbon dioxide in the air. So scientists, unfortunately, may have a chance to see whether this experiment on our planet should continue or not.

A:
Question: Why is it important for scientists to get accurate numbers according to the passage?Options:A Scientists have a chance to research them.B They can bring scientists much more benefit.C Scientists can protect the earth from being pollutedD They can help scientists understand the effects better.Answer:D