input question: Write a multi-choice question for the following article: Article: It's a sure sign that summer is over and winter is on the way -- leaves that were once deep green turn red, yellow and bright orange. It happens every autumn. But did you ever wonder why? The leaves start changing color when the nights start getting longer and the temperature starts getting cooler. Some scientists think that as the number of daylight hours _ the leaves stop making chlorophyll which makes plants green. The reason is that the process of making chlorophyll requires sunlight. But according to horticulture educator Susan Rose from Colorado State University, it turns out leaves don't really change color at all. "The fall colors are actually there all along," she said. "But they are covered by the green chlorophyll. As the chlorophyll stops being produced, the other colors can shine through." The kind of color that the leaves are going to change to is determined by the plant's genetic background. In some places, the leaves start changing color in September -- before autumn even officially begins. In other places, they don't change until late October or even November. Some scientists say the leaves have been changing color later than usual in recent years. And they think global warming has something to do with that. In one study, researchers found that the growing season in the Northern Hemisphere was nearly a week longer, on average, in 2008 than it was in 1982. And a professor from Harvard University found that the leaves, west of Boston, Massachusetts, are changing color about three days later than they used to. However, other scientists disagree with the global warming theory. Susan Rose said the leaves in her part of Colorado are changing "right on schedule." But the leaves in other parts of that state are running a little late. "The lateness in the mountains may have something to do with the really warm late summer and early fall," she said. "But I'm afraid that's just a guess."???
output answer: Question: Scientists guess leaves change color later than usual probably as a result of _ .Options:A genetic backgroundB dry weatherC global warmingD low temperatureAnswer:C

Write a multi-choice question for the following article: Article: A pet parrot that spoke with a British accent when it disappeared from its home four years ago has been reunited with its owner ---- and the bird now speaks Spanish. The reunion was brought about by Teresa Micco, a Southern California veterinarian who mistook Nigel, an African gray parrot, for her own missing bird, the Daily Breeze reported on Sunday. Teresa Micco tracked Nigel's microchip to Darren Chick, a British man who lives in Torrance, California. "I introduced myself and said, 'Have you lost a bird?' "Micco told the newspaper. "He first said, 'No' But he thought I meant recently " When she checked on Chick's name and said she had his African gray parrot, "He looked at me like I was crazy. " He said his bird had gone missing for four years earlier. Little is known about Nigel's whereabouts for the past four years, but Chick says the bird's British accent is gone, and it now chatters in Spanish. Chick says last week's reunion brought tears of joy to his eyes---despite the fact that Nigel bit him when he first tried to pick him up. Micco said the behaviour was not unusual and that Nigel would settle back in soon enough. "He is doing very well," Chick told the newspaper. "It is really strange. I knew it was him from the minute I saw him" It is the fifth parrot reunion helped by Micco, who has been running advertisements for her own missing bird for nine months. That parrot, Benjamin, escaped in February when it flew out through a door that had been left open. Julissa Sperling found Nigel outside her home and brought him to Micco after seeing one of her advertisements. "He was the happiest bird. He was singing and talking all the time," Sperling said. "He was barking like my dogs. I am from Panama, and he was saying, 'What happened?' in Spanish."
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Answer: Question: What happened to Darren Chick four years ago?Options:A He became a veterinarian.B He put an advertisement in a newspaper.C His family moved to TorranceD He lost his pet parrotAnswer:D

Q: Write a multi-choice question for the following article: Article: Teens don't understand the big fuss .As the first generation to grow up in a wired world,they hardly know a time when computers weren't around,and they eagerly catch the chance to spend hours online,chatting with friends.So what? But researchers nationwide are increasingly worried that teens are becoming isolated ,less skillful at person-to-person relationships,and perhaps numb to the cheatings that are so much a part of the e-mail world."And a teen's sense of self and values may be changed in a world where personal connections can be limitless,"said Sherry Turkle. Another researcher,Robert Kraut,said he's worried about the "opportunity costs" of so much online time for youths.He found that teens who used computers,even just a few hours a week,showed increased signs of loneliness and social isolation."Chatting online may be better than watching television,but it's worse than hanging out with real friends,"he said. Today's teens,however,don't see anything strange in the fact that the computer takes up a central place in their social lives."School is busy and full of pressure.There's almost no time to just hang out,"said Parker Rice,17."Talking online is just catch-up time." Teens say they feel good about what they say online or taking the time to think about a reply.Some teens admit that asking someone for a date,or breaking up,can be easier in message form,though they don't want to do so.But they insist there's no harm.
A: Question: The text mainly deals with _ .Options:A teens' pleasant online experienceB teens' computer skills and school workC the effects of the computer world on teensD different opinions on teens' chatting onlineAnswer:D

Problem: Given the question: Write a multi-choice question for the following article: Article: When my sister Gina was born, she had a problem with her heart. Her heart was pretty bad in the beginning and she stayed in the hospital for a month. The first few years were very difficult because she was very sick. She had five operations before she was three years old. She had trouble walking, playing with other children, and going to school. Although Gina couldn't laugh and talk, we all knew that she just needed love and care. Our parents wanted to take Gina to a special place in Florida. There she could swim with dolphins. Gina was afraid of swimming with them because she had never been around dolphins before. We had also never traveled that far as a family. When we got to Florida, we saw where the dolphins lived. It was a place where kids with special needs like Gina could come and spend time. I thought it was going to be a vacation, but it wasn't. Gina had to work hard every day for a week. The trip was amazing. Gina laughed and clapped when she saw the dolphin. The dolphin splashed when it saw Gina. They swam together all day. Gina was able to move her body more than she normally did at home. Mom and Dad were proud of Gina. I was , too.
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The answer is:
Question: We know from the text that Gina _ .Options:A experienced five operations in a monthB got along well with other childrenC stayed in the hospital before threeD was born with a heart diseaseAnswer:D