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A．It is well known all over the world.B．It has become the topic of an article.C．It has
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听力原文： The idea of fighting a noise by making more noise sounds strange, but that's exactly what motor engineers are doing in Germany and some other countries.
Carmaker's research and development laboratories have already proved that mixing in more noise with the help of loudspeakers can reduce the unwanted noise.
Physicists have known about the technique for a long time. Sound is made up of pressure waves in the air. If two sound waves of the same frequency mix so that the highest point of one wave happens at the same time with the lowest point of the other wave, the result is no sound. Therefore, by producing a perfect copy of the noise and delaying it by half a wave cycle, we can kill the unwanted noise. Using this technique many carmakers are racing to develop noise-killing systems both inside and outside the cars.
Another good thing about the use of noise-killing systems is that it saves the need for a silencer, which not only reduces the weight of a car, but also makes the motor burn less oil and work better.
Some engineers believe that the noise-killing system will be used in most cars in 1996. But the carmakers haven't decided if they will put it into production because it would add several hundred dollars to the cost of their cars.
(30)
听力原文：M: How was your weekend？
W: It was awful.
M: Awful？ Really？ But I thought you were supposed to be going on a trip. Did it get cancelled？
W: No, unfortunately, it wouldn't been better if it had.
M: What do you mean？
W: Well, five of us were supposed to go to Chicago in Lisa's car.
M: Yeah？
W: And we were going to stay at Sue's parents' house, which is in Chicago.
M: Right？
W: So it's about a four-hour trip, and we were going to get there on Friday evening, spend Saturday sightseeing, and come back last night so we could go to classes this morning.
M: OK. That sounds like a good plan. So what went wrong？
W: What didn't go wrong？ First of all, we were all crammed into Lisa's tiny car with all four bags.
M: Sounds pretty uncomfortable.
W: Hold on. I'm just getting started. Remember how hot it was this weekend？
M: Yeah, It was so bad I had to get out of the library. I ended up going to the beach both days.
W: Well, we were stuck in Lisa's car Friday afternoon and the air conditioner wasn't working.
M: Why didn't you open the windows？
W: We did, but the breezes blowing in weren't exactly cool.
M: I'll bet you were glad to get to Chicago.
W: That's the worst part. We never made it. Mary started feeling sick from all the heat, so Lisa tried driving faster to find Mary something to drink. To make a 10ng story short, the car broke down and we were stranded till this morning in some small town near the Indiana border.
M: Couldn't Sue's parents come pick you up？
W: They were out of town.
(20)
A．They think it useful.B．They think it valueless.C．They think it a waste of time.D．The
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： In Mr. Allen's high school class, all the students have to "get married." However, the wedding ceremonies are not real ones but imitations. These mock ceremonies sometimes become so noisy that the loud laughter drowns out the voice of the "minister." Even the two students getting married often begin to giggle.
The teacher, Mr. Allen, believes that marriage is a difficult and serious business. He wants young people to understand that there are many changes that must take place after marriage. He believes that the need for these psychological and financial adjustments should be understood before people marry.
Mr. Allen doesn't only introduce his students to major problems faced in marriage such as illness or unemployment. He also exposes them to the common problems they will face everyday. He wants to introduce young people to all the trials and tribulations that can strain a marriage to the breaking point. He even familiarizes his students with the problems of divorce and the fact that divorced men must pay child support money for their children and sometimes pay monthly alimony to their wives.
It has been unsettling for some of the students to see the problems that a married couple often faces. Until they took the course, they had not worried much about the problems of marriage. However, both students and parents feel that Mr. Allen's course is valuable and have endorsed the course publicly. Their statements and letters supporting the class have convinced the school to offer the course again.
(27)
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