One experiment showed that everyone needs to dream. Doctors gave some people sleeping pills. These sleeping pills didnt let them going to REM sleep. After a few nights without dreams, they began to feel bad. They became angry easily, they worried a lot, and they wanted to fight with everyone. Then they stopped taking the sleeping pills. They all began to dream all night for a few nights to catch up.
Why do people dream? Dreams give them time to find the answers to some of their problems. If they think they will have difficult problems the next day, they may spend more time on REM sleep the night before. In their dreams, they may find an answer to their problems.
Questions 29 to 31 are based on the passage you have just heard.
29.How often does a person dream each night?
【解析】文章一开始即交待了一个人一晚上要做梦四到六次。从第一句就可看出People dreams four to six times a night.因此,答案为 。
30.What is true according to this passage?
【解析】安眠药会阻止人们进入REM睡眠状态。These sleeping pills didnt let them going to REM sleep.可看出 项正确。
31.Why do people dream?
【解析】文中明确给出了答案Dreams give them time to find the answers to some of their problems.因为在梦中人可以找到自己的问题的答案。
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