听力真题：
Section B
Passage One
26.
A. Diet.
B. Sleep.
C. Space.
D. Stress.
27.
A. They tend to reproduce more.
B. They may show more signs of violence.
C. They can eat and sleep better.
四级听力练习 D. They may commit suicide.
28.
A. Rats can populate rapidly.
B. Population explosion can lead to violence.
C. Overcrowdedness may have the same effects on man.
D. It is a natural law that animals live and die.
答案解析：
Section B
Passage One
How much living space does a person need? What happens when his space requirements are not adequately met? Sociologists and psychologists are conducting experiments on rats to try to determine the effects of overcrowded conditions on man. Recent studies have shown that [26]the behavior of rats is greatly affected by space. If rats have adequate living space, they eat well, sleep well, and reproduce well. However, if their living conditions become too crowded, their behavior pattern and even their health perceptibly change. They cannot sleep and eat well, and signs of fear and tension become obvious. [27]The more crowded they are, the more they tend to bite each other and even kill each other. Thus for rats, population and violence are directly related. Is this a natural law for human society as well? [28]Is adequate space not only desirable, but essential for human survival?
Questions 26 to 28 are based on the passage you have just heard.
26. What affects rats' behavior?
正确答案：C
解析：听到“最近研究表明：鼠类行为受空间影响颇大”，可判断C(空间)正确。
27. What effect may inadequate living space have on rats according to the passage?
正确答案：B
解析：原文说，空间越拥挤，老鼠就越容易相互撕咬和残杀，故B正确。A、C是积极健康的行为，而B、D则是不健康的行为。根据本文主题也可排除A、C，短文也未提及“自杀”，可排除D。
28. What is the experiment done on rats intended to prove?
正确答案：C
解析：短文介绍了有关老鼠的实验后提出，对老鼠而言，老鼠数量和暴力之间具有直接的关系。作者进而问道：这是否也适用人类社会?足够的空间是否也是人类生存所必需的条件?故对老鼠的研究是为人类服务的，C正确。
大学英语四级听力真题及答案解析
听力真题：
Conversation Two
23.
A. Since Friday.
B. Since Saturday.
C. Since Sunday.
D. Since Monday.
24.
A. He has a cold.
B. HE has the flu.
C. He has a stomachache.
D. He has a toothache.
25.
A. Take herbal medicine.
B. See another doctor.
C. Drink chicken soup.
D. Stay in bed.
答案解析：
Conversation Two
W: So, how are things going, Steve?
M: Well, to be honest, Carla, [23]I was feeling great on Saturday, but I started to feel sick Sunday afternoon. I thought I'd get better, but I feel worse than before. And I'm really worr
ied because I'm scheduled to have a presentation at work on Friday, so I have to be better by then.
W: Well, what seems to be the problem?
M: Well, [24]I thought I had the flu, but the doctor said it was just a bad cold. He gave me some cold medicine to take care of my stuffy nose and fever. I'm supposed to take the medicine three times a day after eating, but it doesn't seem to help. He also told me to stay off my feet for a day or so, but I'm so busy these days.
W: Listen, forget about that medicine! I have just the thing to get rid of bad colds. You see, my mom is really into herbal medicine.
M: Oh, no, thanks.
W: Ah, come on! Give it a try. [25]You just take some of my mom's herbal tea and drink it four times a day. Believe me. You'll be up and dancing around in no time.
M: Dancing around in no time, right? Well, I guess. Nothing else seems to be doing the job.
W: Great. I'll come by your place at 7:30. See you then.
Questions 23 to 25 are based on the conversation you have just heard.
23. How long has the man been sick?
正确答案：C
解析：男士说星期六他还感觉很好，星期天下午开始觉得恶心，故答案为C。
24. What's the matter with the man?
正确答案：A
解析：女士问男士有什么问题时，男士回答起初以为是流感，医生诊断不过是重感冒，由此可知答案是A。
25. What does the woman suggest the man do?
正确答案：A
解析：对话中女士建议男士尝试她母亲的中药茶，因此A正确。
大学英语四级听力练习题及答案解析
听力真题：
Conversation One
19.
A. Walk the dog.
B. Clean the house.
C. Go to the dentist's.
D. Finish her assignment.
20.
A. 12:30 pm.
B. 2:00 pm.
C. 4:30 pm.
D. 5:30 pm.
21.
A. Exciting.
B. Rewarding.
C. Disappointing.
D. Exhausting.
22.
A. They can't decide on a video.
B. Susan's mother is going to use the video machine.
C. Susan will be asked to do something else.
D. The machine isn't working.
答案解析：
Conversation One
M: So, Susan, do you have anything planned for thisSaturday?
W: Uh, I'm kind of busy. Why do you ask?
M: Oh, I was wondering if you'd like to get togetherand do something, like watch a movie or take a walkdown by the lake.
W: I'd love to, but I'm really going to be busy all dayon Saturday.
M: What do you have to do on that day?
W: [19]First, my mom asked me to help clean the house in the morning, and then I have adentist appointment at 12:30. I can't miss that 'cause I've canceled twice before.
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