1. There was once a trend in the U.S. that .

A．young adults left their parents and lived independently

B．with the marriage rising, young adults spent more time living with their parents

C．middle class young adults stayed with their parents

D．divorced young adults moved back to their parents’ home

2. Which of the following is not the reason for young adults returning home?

A．They want to seek emotional comfort after divorce

B．They are too naïve to live independently

C．They find housing cost is a serious problem for them.

D．It’s difficult for them to afford the expense of away—from—home college education.

3. The disadvantages of young adults’ staying with their parents are the following except .

A．the difficulty to support a larger family

B．the inconveniences in everyday life

C．parents’ interference in children’s privacy

D．excessive restrictions of children’s behavior

4. What is the best way for parents and children?

A．Parents should let their children alone.

B．Children should share the family expenses

C．Children should visit their parents from time to time.

D．Children should live independently when they’re 18.

5. The underlined word “skyrocketing” means .

A．soaring B．of rocket C．fast D．speeding

(B)

Animals seem to have the sense of eating when they are hungry and they do not eat more than their bodies need. It had been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins, even though there is no difference in taste or smell between the two water bottles. When a fragrant flavor was added to the vitamin, enriched liquid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke “the habit” and went back to where the necessary vitamins were.

In an experiment, babies of 6 to 12 months old were placed in a cafeteria, with a wide selection of baby food before them. They were given whatever food they pointed to or appeared interested in. We are told that at first they showed some unusual eating patterns, but over a period of time they managed to select a well—balanced diet.

So, in selecting food, rats and babies do seem to know and act on what’s best for them. Clearly, there is a kind of “body wisdom” which humans soon lose. Most of us do not eat as wisely as we could .Some people eat foxes, dogs, and black birds. While we eat cows and pigs .So what people eat and how much they eat seem to be greatly influenced by what is going on around them.

1. In the experiment on rats, a fragrant flavor was added to the rats, a fragrant flavor was added to the rats drinking water to ____________________.

A. encourage rats to drink it

B. find out what kind of flavor rats prefer

C. test whether rats know which drink is with fragrant flavor

D. demonstrate that vitamins are tasteless

2. The expression “the habit” in the first paragraph refers to drinking water which _______________.