Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Mary was waiting for the airplane to take off. She was happy to get a seat by herself. Just then,an air hostess came up to her and asked. "Would you mind changing your seat? A man would like to sit with his wife." The only available seat was next to a girl with her arms broke, a black-and-blue face, and a sad expression. "I don't want to sit there," Mary thought immediately. But a soft voice spoke, "She needs help." Finally, Mary moved to that seat. The girl was named Emily. She had been in a car accident and now was on her way for treatment. When the snack and juice arrived, Mary realized that Emily could not feed herself. Mary considered offering to feed her but hesitated , as it seemed too impolite to offer a service to a stranger. But then Mary realized that Emily's need was more important. Mary offered to help her eat. Although Emily was uncomfortable to accept, _ . They became closer and closer in a short time. By the end of the five-hour trip, Mary's heart had warmed, and the time was really better spent than if she had just sat by herself. Mary was very glad that she had sat next to Emily and fed her. Love sometimes goes beyond human borders and removes the fears that keep people away. When we reach our hands to serve another, we grow to live in a larger and more rewarding world. Options: A She lost her job. B She suffered from a car accident. C She met a stranger. D She disliked the air hostess. Answer: B She suffered from a car accident. Question:
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The answer is:
Why did Emily have a sad expression at the beginning?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Now, more and more cities are facing problems, such as high housing costs, pollution and crime. Let's see what people in Hyderabad, India and in Sao Paulo, Brazil do to solve the problems. Hyderabad, India To improve people's lives, Hyderabad is planting more and more trees. The city is even creating _ buildings that use less water and less electricity for power. Adding green to a city has a number of advantages. For example, trees make the air cleaner. In Hyderabad, streets were grey and dirty in the past. However, today they are filled with trees and flowers, making the city cleaner and more colourful. Green areas also give people places to relax or exercise. A study in the USA shows an interesting thing: the greener a neighborhood is, the less crime there is. Sao Paulo, Brazil Many people work in the centre of Sao Paulo, but they don't live there. They've spread out to neighborhoods outside the city because housing is cheaper. Every day, these people travel into the city, and traffic is very heavy. City planners are using different ways to deal with the problem. First, they are building better subways. Another goal is to make it cheaper for people to live in the downtown area . Doing this will reduce traffic and pollution in the city. Options: A A lot of people don't have jobs. B Too many people live in the city centre. C A lot of people are moving out of the city. D Too many people travel into the city every day. Answer: D Too many people travel into the city every day. Question:
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The answer is:
According to the passage, what problem does Sao Paulo have?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Tea bag drinking is most Westerners' favorite way of drinking tea. Do you know how it came about? The tea bag was invented in 1908 by Thomas Sullivan, an American tea seller. He was sending out free tea in silk bags for people to try. People put the bags together with the tea leaves into the cup and added hot water. The tea tasted good, and people thought it was easy to clean the cup. They were not happy when Sullivan started sending them loose tea again. Sullivan realized that he had a hot new thing in his hands, and he built a machine to pack the bags. As tea bags became popular, they were changed from silk to gauze and later paper. In 1952, Lipton Tea made the tea bag even more popular with its invention of the four-sided tea bag. Tea bags were soon a hit in the UK, and today 85%of the tea in the UK is packed in paper bags. However, many people still prefer loose-leaf tea. This is because some tea companies put not very good tea in their tea bags. But for most drinkers, tea bags are still the easy and tasly way to go. Options: A the tea in bags was free and very good B the tea tasted good and the cup was easy to wash C people were happy, with the loose tea D people didn't know any better way to enjoy the tea Answer: B the tea tasted good and the cup was easy to wash Question:
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The answer is:
The tea in silk bags was welcome because _ .