Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: I have just invented a time machine. It can take people to the past or the future for five hours. I got into my time machine and keyed the words, "1964,11 Niven Road, Singapore", then pressed the button . In a moment, I was in front of a house, 11 Niven Road. I thought that it would be fun to see what my father was like when he was 10 years old. I saw four children looking for a lost dog. They were my father, my uncle Kelvin, my aunt Peek and aunt Janet. I introduced myself as an old friend and agreed to help them look for their dog, Blackie. We wanted to climb a hill and looked into the houses below. When we reached the top, we heard a dog barking. "Blackie !" my father shouted. We looked down and saw Blackie in the house. We knocked on the door of the house and asked the man to return Blackie to us. The man asked us to prove the black dog was Blackie. My father called out Blackie's name and the dog barked. The man had to give Blackie back to us. We went back to 11 Niven Road and I said goodbye to them. My five hours were almost up. I ran to the machine and soon I was back in my time. What an adventure ! Options: A an adventure to the past B an adventure to the future C a lovely dog named Blackie D the childhood of the writer's father Answer: A an adventure to the past Question:
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The answer is:
The passage mainly tells us about _ .

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Do you know Su Bingtian? He is a Chinese runner. He was born in Zhongshan City, Guangdong Province on August 20th, 1989. When he was a child, he liked running in the school running team. His parents supported him in practicing running and they often encouraged him to run. Though it's very hard for him to win every race, he never gives up. He tries his best to run well every day. He took part in the regular match in November, 2004 for the first time. After that, he won many first prizes in all kinds of matches. On May 31st, 2015, in Saturday's Eugene Grand Prix, the 1.72 meters-tall runner finished third in 9.99 seconds, behind American Tyson Gay in 9.88 seconds and Mike Rodgers in 9.90 seconds. Su Bingtian becomes beats 10-second barrier as the first Asian-born. China's Zhang Peimeng, who raced to his personal best of 10.00 seconds in 2013, is considered the closest to beating the barrier. Now Su Bingtian broke his record. "I am so proud of my result. I can write my name into history now and I will work harder and run faster," said Su Bingtian. Now let's congratulate to Su Bingtian! We hope Su Bingtian will have a better future and good luck to him! Options: A running B swimming C dancing D drawing Answer: A running Question:
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The answer is:
What did Su Bingtian like when he was a child?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: For hundreds Of years, scientists have been trying to answer what things have an effect on people's emotions . How you feel is controlled by many things. Your emotions can be affected by your personality, by the actions of others and by events around you. Perhaps you don't know your emotions can be influenced by the weather as well. People often say they feel good when the sun is shining and sad when it is cloudy. In fact, sunlight makes us feel good. When sunlight hits our skins, our bodies produce a vitamin. Vitamins are natural chemicals which we all need to stay healthy. Sunlight helps our bodies produce vitamin D. Vitamin D helps our bodies make a special chemical. This special chemical affects our brains and makes us feel happy. For example, there are long, dark winters of little sunlight in Sweden and Norway, so many people in these countries often feel sad. Without much sunlight, their bodies produce less vitamin D. Without enough vitamin D, their bodies make less of this special chemical which makes them feel good. To help the people in these countries feel better, special "sunrooms" with artificial lights have been built. People can go there and get "sunlight" for an hour or two! The weather can also affect people's emotions in other ways. Hot weather can make people angry because people feel uncomfortable when they are hot. In the same way, rain can make people angry because being wet can be unpleasant. As you can see, the weather can have an effect on the chemicals which control our brains. Through these ways, the weather can influence our emotions. Sadly, while the weather can change us, we can hardly change the weather. Options: A It is a kind of artificial chemical. B It makes us worried by affecting our brains. C It is needed by us all to keep fit. D It is in the sunlight. Answer: C It is needed by us all to keep fit. Question:
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The answer is:
Which of the following is true about vitamin D according to the passage?