大学英语四级模拟题目3答案(5)

all. As she grew up, cars and trains came in, and [28] she remembers her first ride with a real sense of amazement that anyone could move so fast.

Passage Two

【听力原文】

The first step to stop drug abuse is to know why people start to use drugs. The reasons people abuse drugs are as different as people are from one to another. [29] But there seems to be

one common thread: people seem to take drugs to change the way they feel. They want to feel better or feel happy or to feel nothing. Sometimes, they want to forget or to remember. People often feel better about their lives when they are under the influence of drugs. But the effects don’t last long. Drugs don’t sol ve problems. They just postpone them. No matter how far drugs may take you, it’s always around trip. After a while, people who use drugs may feel worse about themselves, and then they may use more drugs. If someone you know is using or abusing drugs, you can help. [30] The most important part you can play is to be there. You can let your friends know that you care. You can listen and try to solve the problem behind your friend’s need to use drugs. Two people together can often solve a problem that seems too big for one person alone. [31] Studies of heavy abusers in the United States show that they felt unloved and unwanted. They didn’t have close friends to talk to. When you or your friends take the time to care for each other, you’re all helping to stop dru g abuse. After all, what is a friend for?

Passage Three

【听力原文】

[35] One way that scientists learn about man is by studying animals, such as mice, rats, and monkeys. The scientists in a laboratory are experimenting on mice. [32] They are studying the relationship between diet and health. At this time, over one hundred experiments are going on in this laboratory.

In this experiment, the scientists are studying the relationship between the amount of food the mice eat and their health. The mice are in three groups. All these groups are receiving is different. [33(1)] The first group is eating one cup of food each day, the second group is eating two cups, and the third group of mice is eating three cups.

After three years, the healthiest group is [33(2)] the one that is only eating one cup of food each day. The mice in this group are thinner than normal mice. But they are more active. Most of the day, they are running, playing with one another, and using the equipment in their cages. Also, they are living longer. [34] Mice usually live for two years. Most of the mice in this group are still alive after three years.

The second group of mice is normal weight. They are healthy, too. They are active, but not as active as the thinner mice. But they are only living about two years, not the three years or more of the thinner mice.

The last group of mice is receiving more food than the other two groups. Most of the day, these mice are eating or sleeping. They’re not very active. These mice are living linger t han the scientists thought—about a year and a half, but they aren’t as healthy. They’re sick more often than the other two groups.

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