Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: If you watch the sky for about an hour after the sun goes down , you may see some " moving stars". But they're not really stars. They're man--made satellites . And the biggest of all is the International Space Station(ISS). From May to July is the best season to watch the ISS flying over the earth. And people can see it with their eyes. The ISS is the biggest satellite and scientists want to live on it. They think that the best way to learn more about space is to live there. When the space station is finished , it will be like a city in space. People will stay and study there with many of the things they have at home. Laboratories, living rooms and power stations are being built. The ISS is the most expensive space program. Billions of dollars are being spent on it every year. Scientists hope that the ISS will be _ for future space exploration . "The ISS will help us understand the human body better, explore space and study the earth. It can help us make life on the earth better, " said Kathryn Clark , an ISS scientist. Sixteen countries are part of the program: the US, Russia, Canada, Japan, Brazil and 11 European countries. China isn't an ISS country , but it has helped with some of the experiments. In 2003 , China sent some rice up to the ISS to find out what space would do to it. ,. Options: A It is a big city in space. B It is the biggest man-made satellite. C It is a real moving star. D People can't see it with their eyes. Answer: B It is the biggest man-made satellite. Question:
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The answer is:
What is true about the International Space Station?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Canada geese are large blue and white birds .When autumn arrives ,they have to fly south where the weather is warmer .The winters are so cold in Canada that the birds will die if they stay there . Last spring ,Bill Lishman found sixteen young Canada geese on his farm "They had lost their parents , "Bill thought . "These young birds won't know what to do in the autumn . Bill had a small plane and he decided to teach the birds to follow him .All through the summer ,he went on short trips in his plane and the young geese flew after him ." When the cold weather arrived in autumn ,Bill flew to Virginia in the United States ,600 miles south from his home in Canada .The geese follwed him all the way .Bill flew to Virginia and returned home . This spring ,Bill was waiting for the birds to come back .They didn't arrive ,so Bill flew to Virginia to get them .He looked for them for two weeks but he couldn't find them . When he arrived back home ,Bill found the geese waiting for him .Then had found the way home without him ! Options: A it's warmer there B it's 600 miles away from his home C he wanted the birds to fly after him D it's a beautiful place in the United States Answer: A it's warmer there Question:
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The answer is:
Bill took the birds to virginia because _ .

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Lamu was a 12-year-old Tibetan girl. She wanted to go to Beijing to watch the 2008 Olympics. Only one month ago, Lamu still thought it would be difficult. In the past Tibet had no railroad . If Lamu took a bus, it would take her a long time to reach Beijing. And a plane ticket would cost lots of money. However, things changed for Lamu. She was able to buy a ticket to the world's highest railroad. The Qinghai-Tibet Railway had been completed! The 1,142-kilometer railroad runs on the Qinghai-Tibet plateau . Lamu could reach Beijing by train in 48 hours! About 550 kilometers of the railroad are constructed on the frozen earth . When the frozen earth warms in summer, it can move the track. But Chinese scientists have built a special structure to solve the problem. The Qinghai-Tibet Railway has been designed with the wild animals in the designers' minds. It also has special underpasses for animals like Tibetan antelopes to go through. "The new railroad greatly helps Tibet's tourism,"said Liu Yueqin, an expert at the Chinese Academy of Social Sciences . As more tourists take trains to Tibet, there are more money for Tibetans. With the money, more kids can go to school. The railroad also makes things less expensive in Tibet. Now one can buy a TV set for about 1,500 yuan. It used to be much higher than that price. When there was no railroad, it had been difficult to send things in and out of Tibet. With the new railroad, shopping can be more convenient and faster. Options: A all Tibetan children could go to school B the transportation in Tibet was convenient and fast, too C it was hard for Tibetans to buy and sell things in and out of Tibet D the Tibetans had never walked out of Tibet Answer: C it was hard for Tibetans to buy and sell things in and out of Tibet Question:
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The answer is:
Before the railroad was finished, _ .