Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: London used to be "foggy" for the same reason that cities like Beijing' or Chongqing are "foggy~ today. The "fog was in fact smog, a mixture of smoke and fog. In other words, it was made by air pollution In London, some of this pollution came from factories, but much of it came from the coal that people burnt in their houses to keep warm during the winter. By the 1950s, London's smog problem had become so bad that the-government decided to do something to clean the air. A new law was made and nobody could bum coal in any British city. Within a few years, the air became much cleaner. There were no more " _ ". . Many Chinese cities now face the same sort of' problem with air pollution that . London faced 40 0r 50 years ago. However, this problem is more difficult for Chinese cities to solve One reason is that more of the pollution comes from the factories, rather than from coal burnt in people's houses If these factories were closed, this would harm the economy and lots of people would lose their jobs. Another reason is that changing from coal to cleaner fuel , like gas, is quite expensive. However, the air in many Chinese cities is becoming cleaner and cleaner, as the government and people pay more and more attention to cutting down pollution . As a result,there are fewer "pea-soupers" in Beijing than there used to be. . Options: A Air pollution in Beijing and Chongqing. B Air pollution in London C Air pollution: different cities, different ways D Coal burning. Answer: C Air pollution: different cities, different ways Question:
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The answer is:
What's the text mainly about? .

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Let me tell you my pen friend Ivan. He is 12 years old. He likes playing football. He usually plays football with his friends at weekends. Ivan lives with his father and mother in a city in France. They have a home with five rooms, a swimming pool and a garden. They often have a party in the garden at weekends. They like to help their neighbours. His home is not near his school, so Ivan takes a bus for an hour and then walks for 10 minutes to school. There is a Basketball Club near his school. He likes playing basketball in the club. Ivan's father is a worker. He is busy. Ivan's mother is a doctor. She is nice to the patients. Ivan wants to be a teacher when he grows up. I want to be a teacher, too. Every month Ivan writes two letters to me. He'll come to China next year. We'll meet then. Options: A Basketball and swimming. B Football and basketball. C Football and swimming. D Reading and swimming. Answer: B Football and basketball. Question:
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The answer is:
What are Ivan's hobbies?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: This is a beautiful park near my home. People like to go to the park after work. Some of them go to the park every day. Look! This is Mr. Smith. He is sitting on a chair and watching the children. Some children are playing the game of _ . Some boys are playing yo-yo. Lucy and Lily are standing under a tree. They are talking. There is a small river in the park. We can see some boats in the river. Some children are sitting in the boats with their fathers and mothers. Listen! A lot of birds are singing in the trees. This is really a nice park. I come here to read English after school every day. Options: A He is singing. B He is sitting in a boat. C He's playing a game. D He's watching the people in the park. Answer: D He's watching the people in the park. Question:
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The answer is:
What's the writer doing?