One experiment showed that everyone needs to dream. Doctors gave some people sleeping pills. These sleeping pills didn't 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】[B]文章一開始即交待了一個人一晚上要做夢四到六次。從第一句就可看出People dreams four to six times a night.因此，答案為 [B]。

　　30.What is true according to this passage?

　　【解析】[D]安眠藥會阻止人們進入REM睡眠狀態(tài)。These sleeping pills didn't let them going to REM sleep.可看出 [D] 項正確。

　　31.Why do people dream?

　　【解析】[D]文中明確給出了答案Dreams give them time to find the answers to some of their problems.因為在夢中人可以找到自己的問題的答案。

　　Passage Three

　　O.K., everybody. Can we start the meeting now? I'm Jeff Milton, the chairperson of the Graduation Committee for this year. You've all been selected as representatives to plan the graduation ceremonies. I'm sending around the sheet of paper for you to fill in your name and telephone number. Also, please write down what part of the ceremonies you would like to work on. Remember, as a representative, you will have a lot of responsibilities. So only sign up if you feel you have the time to participate. When everyone has finished writing down the information, please return the paper to me. At our next meeting one week from today, we'll start to discuss the details of the ceremonies.

　　Questions 32 to 35 are based on the passage you have just heard.

　　32.Who is the speaker?

　　【解析】[C]從文章開頭說話者的自我介紹就可知道他是這個委員會的主席。

　　33.What is the purpose of the meeting?

　　【解析】[D]在座的代表都是被選來計劃畢業(yè)典禮的事。