B） to explain when people wil act in emergencies

　　C） to explain what people will do in emergencies

　　D） to explain how people feel in emergencies
　　
　　37. Which of the following is NOT true?
　　
　　A） When a person tries to help others, he must be clear that there is a real emergency.

　　B） When a person tries to help others, he should know whether hey are worth his help.

　　C） A person must take the full responsibility for the safety of those in emergencies if he wants to help.

　　D） A person with a heart attack needs the most.
　　
　　38. The researchers have conducted an experiment to prove that people will act in emergencies when　　　　　.
　　
　　A） they are in pairs　 　B） they are in groups

　　C） they are alone 　　　D） they are with their friends
　　
　　39. The main reason why people fail to act when they stay together is that　　　.
　　
　　A） they are afraid of emergencies

　　B） they are reluctant to get themselves involved

　　C） others will act if they themselves hesitate

　　D） they do not have any direct responsibility for those who need help
　　
　　40. The author suggests that　　　　　.
　　
　　A） we shouldn't blame a person if he fails to act in emergencies

　　B） a person must feel guilty if he fails to help

　　C） people should be responsible for themselves in emergencies

　　D） when you are in trouble, people will help you anyway
　　
　　Passage 9
　　
　　People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a similar problem. They often accept the opinions or ideas of other people. Other times they begin to act without thinking; they try to find a solution by trial and error. However, when all these methods fail, the person with a problem has to start analyzing. There are six stages in analyzing a problem.
　　
　　First the person must recognize that there is a problem. For example, Sam's bicycle is broken, and he cannot read it to class as he usually does. Sam must see that there is a problem with his bicycle.
　　
　　Next the thinker must define the problem. Before Sam can repair his bicycle. he must find the reason why it does not work. For instance, he must determine if the problem is with the gears, the brakes, or the frame. He must make his problem more specific.
　　
　　Now the person must look for information that will make the problem clearer and lead to possible solutions. For instance, suppose Sam decided that his bike does not work because there is something wrong with the gear wheels. At this time. he can look in his bicycle repair book and read about gears. He can talk to his friends at the bike shop. He can look at his gears carefully. after studying th

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