Question: Write a multi-choice question for the following article, with the given choices and answer: Article: When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors? As we know, scattering happens when light goes through the air. For the same media , if the _ is long, the sscattering will be short. If the wavelength is short, then the scattering will be long. Of all lights we can see, red has the longest wavelength. So the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days. Using the red light can help drivers in farther places see the lights. It helps drivers slow down or stop in time. So there will be fewer accidents. Moreover, red can also excite people. We can act more quickly when we see the color red. In a word, red lights help drivers stop in time and help prevent accidents. Options: A It can make drivers stop in time. B It can help drivers act more slowly. C It can help drivers see the lights in farther areas . D A and C Answer: D A and C Question:
Answer: What can the red light help drivers do?

Question: Write a multi-choice question for the following article, with the given choices and answer: Article: In London, there has always been a main problem. In order to solve this problem, the government has decided to have a bike revolution . It has decided to provide 6,000 bikes for the people to rent. The government encourages local people to ride bikes in order to solve the traffic problem. More than 12,000 people have agreed to the idea. Some of them ask for more than one key. Although there are not enough bikes, an official from the government said that they would find some ways to deal with such a shortage. Local people can get these bikes at special docking stations .There are about 315 docking stations across the city. About 12,450 keys have already been handed out to the local people, but only 6,000 keys can be used now. Let's see the cost you need to pay. One key costs PS3, and the cost of using the bike is PS1 for an hour. The cost per hour increases as the hours increase, so it will cost PS50 if you rent the bike for 24 hours. The official from the government said they also needed to face a lot of problems, for example, some bikes may be lost. But they said they would try their best to solve all the problems to make sure the success of the program. Options: A the traffic problem B the population problem C the family problem D the health problem Answer: A the traffic problem Question:
Answer: In London, the government has decided to provide bikes for local people to rent in order to solve _ .

Question: Write a multi-choice question for the following article, with the given choices and answer: Article: Mr Smith gave his wife money every Friday evening. His wife always spent it all the next Wednesday, so that for the next three days she had no money to spend at all. One day Mr Smith asked her, "But how did you spend all that money?" She answered, "I don't know ."So on Friday evening, Mr Smith gave her money together with an exercise book and a pencil. He said to his wife , "Please write down how you spend the money ."Next Tuesday, his wife had no money again. Mr Smith took the exercise book to see how she had spent it. "I have done what you told me,"she said gladly . She had written "Friday, I got 18 pounds from Mr Smith. " on the first page, and on the second page, she wrote , "Tuesday, I have spent it all." Options: A glad B tall C careful D healthy Answer: C careful Question:
Answer:
The story tells us that Mrs Smith was not very _ .