input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Smog is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news interviewer with CCTV, discussed the questions in her documentary Under the Dome. The 103-minute film was on websites on Feb 28. In the film, Chai visits polluted places and talks to officials and scientists. She thinks that burning too much coal and oil are the main causes of PM2.5 and smog. To solve the problem, Chai suggests that we should clean our coal and oil or replace them with cleaner energy such as natural gas. In her film, Chai also emphasized that everyone can do something to help control smog too. For example, we can live a greener life by using more public transport. Or if we see things that could harm the environment, we can try to stop it. In the film, when she sees a restaurant cooking without any suitable filter facilities , she calls the hotline 12369. The restaurant installed the filter a week later. Chen Jining, the new minister of environmental protection, praised Chai. "This film encourages ordinary people to take notice of the environment. This is what we need in the future." Options: A Setting off too many fireworks. B Burning too much coal and oil. C Too many cars in big cities. D Too many factories and companies. Answer: B Burning too much coal and oil. Question:???
output answer: What is the main cause of smog according to Chai?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: One day, a farmer was walking along a road with his son Thomas. The father said, "Look! There's a horseshoe, pick it up and put it in your bag." Thomas said, "It isn't worth the trouble." His father said nothing but he picked it up himself. When they got to a nearby town, they had a rest. There the farmer sold the horseshoe and with the few pennies he bought some cherries . The father and the son continued their way. The sun was well up in the sky, and there wasn't a house or even a tree where they could have a rest. Thomas felt too thirsty to walk on. At this time, his father dropped a cherry on the ground and Thomas picked it up quickly and ate it. After a while, his father dropped another cherry and once again, his son lost no time in picking it up and putting it in his mouth. And so they went on. The old farmer dropped the cherries and the son picked them up. When Thomas had eaten up all the cherries, his father said to him, "My dear son, if you had bent down early to pick up that horseshoe, it would not have been necessary for you to bend so many times for the cherries. Always remember the lesson that he who does not worry about the little things will find that he cannot do the great things." Options: A The son. B The father. C Both the father and the son. D Neither the father nor the son. Answer: B The father. Question:???
output answer: Who picked up the horseshoe at last?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: If you go to Hong Kong by air, you will arrive at Kai Tak Airport. Because there was no enough land, it was built out into the sea. It is in the part of Hong Kong called Kowloon. Kowloon is one of the two big cities in Hong Kong. The other city is Hong Kong itself. It is on an island. You can get there by ship or through a tunnel under the sea. Much of Hong Kong is farmland and mountains. The population of Hong Kong is over 6 million. Most of them are Chinese. Chinese and English are spoken by many people there. Clothes, computers, radios and TVs are made in Hong Kong. You can watch dog-racing or motor-racing. Some places are quiet and beautiful. When you are hot and tired, there are small and cool gardens to rest in. There are also a lot of tall buildings to live in. Hong Kong is also a good place for Chinese cooking. You can enjoy many kinds of Chinese cooking, for example, fish, meat and vegetables. Beijing Roast Duck is famous as well. There is certainly a lot to see and to do in Hong Kong. In 1997, Hong Kong was returned to China. It's a part of China. Options: A dog-racing is interesting B Beijing duck is famous C Chinese food is famous D Hong Kong is a good place for travelling Answer: D Hong Kong is a good place for travelling Question:???
output answer: The main idea of the fourth part is that _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Parents are a child's first teachers. But some parents never learned from good examples. In New York City, Covenant House tries to help homeless young mothers become good parents. The twelve or so teenagers who live at the shelter attend parenting classes four days a week. The class is called Mommy and Me. Teacher Delores Clemens is a mother of five and a grandmother. She teaches basic skills, like how to give a baby a bath and how to dress a baby in different seasons. She remembers one student who learned from her mother not to pick up a crying baby. The mother said that would only make the child needy. "I said 'That's not true. You have to hold your baby! He is crying for a reason. If you never pick him up, he's going to keep crying. Pick your baby up. Hug him! And she started to do that. They just want a little hugging and a little love. And it works!" Delores Clemens said. Delores Clemens says her students also learn how to be good mothers by letting themselves be mothered. "I'm doing something for them that never has been done for them before." In class, with her baby son, is Natasha. She lived on the streets. She is glad not only for the warmth and shelter of Covenant House. As she told reporter Adam Phillips, she is also glad for the help they offer in looking for a safer life. "Did you go to high school?" "Yes." "Did you graduate?" "No, I didn't. I was in my last year and then, I got pregnant and I got lazy." "You look like you are willing to accept responsibility for that." "Yes, I am, and I would like to finish." Some teenage mothers wish they themselves could be children again. 18-year-old Placida knows that feeling. "Because you have to get up every two hours in the middle of the night, and you can't go out and say 'I am going to buy this for myself.' No. I have to buy pampers, clothes and food. So now it's two. So it's very hard." Placida said. Options: A a class where teen parents are looked after B a class where parents are teaching their children C a class where homeless mothers learn to find a job D a class where teens learn mothering and are mothered Answer: D a class where teens learn mothering and are mothered Question:???
output answer:
The passage is mainly about _ .