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]文章一开始即交代了一个人一晚上要做梦四到六次。从句就可看出People dreams four to six times a night.因此，答案为 [B]。

　　30.What is true according to this passage?

　　【解析】[D]安眠药会阻止人们进入REM睡眠状态。These sleeping pills didn’t let them go to REM sleep.可看出 [D]项正确。

　　31.Why do people dream?

　　【解析】[D]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。

　　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]从文章开头说话者的自我介绍就可以知道他是这个委员会的主席。

　　33.What is the purpose of the meeting?

　　【解析】[D]在座的代表都是被选来计划毕业典礼的事。

　　34.What should the students write on the paper?

　　【解析】[A]在座的学生应该在表格上填写姓名、电话以及工作意向。

　　35.When is the next meeting?

　　【解析】[B]从这句话At our next meeting one week from today可知下次会议在下周召开。

 2011年12月英语四级考试全真预测试卷：听力 摘自 《2011大学英语四级考试全真预测卷》