[单项选择]

Passage One
It has been shown that children who smoke have certain characteristics. Compared with non-smokers they are more rebellious, their work deteriorates as they move up school, they are more likely to leave school early, and are more often delinquent and sexually precious. Many of these features can be summarized as anticipation of adulthood.
There are a number of factors, which determine the onset of smoking, and these are largely psychological and social. They include availability of cigarettes, curiosity, rebelliousness, appearing thought, anticipation of adulthood, social confidence, the example of parents and teachers, and smoking by friends and older brothers and sisters.
It should be much easier to prevent children from starting to smoke than to persuade adults to give up the habit once established, but in fact this has proved very difficult. The example set by people in authority, especially parents, health care workers, and teachers,
A. objective
B. emotional
C. critical
D. indifferent

Passage One
It has been shown that children who smoke have certain characteristics. Compared with non-smokers they are more rebellious, their work deteriorates as they move up school, they are more likely to leave school early, and are more often delinquent and sexually precious. Many of these features can be summarized as anticipation of adulthood.
There are a number of factors, which determine the onset of smoking, and these are largely psychological and social. They include availability of cigarettes, curiosity, rebelliousness, appearing thought, anticipation of adulthood, social confidence, the example of parents and teachers, and smoking by friends and older brothers and sisters.
It should be much easier to prevent children from starting to smoke than to persuade adults to give up the habit once established, but in fact this has proved very difficult. The example set by people in authority, especially parents, health care workers, and teachers,
A. Some children start to smoke out of curiosity.
B. Many children start to smoke because they want to appear mature.
C. In order to have fewer children smokers, parents, teachers and health care workers should not smoke.
D. It is not as difficult to prevent children from starting to smoke as to persuade adults from smoking.

Passage 3
How often one hears children wishing they were grown up, and old people wishing they were young a gain. Each age has its pleasures and its pains, and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets.
Childhood is a time when there are few responsibilities to make life difficult. If a child has good par ents, he is fed, looked after and loved, whatever he may do. It is impossible that he will ever again in his life be given so much without having to do anything in return. In addition, life is always presenting new things to the child-things that have lost their interest for older people because they are too well-known. But a child has his pains: he is not so free to do what he wishes to do; he is continually being told not to do things, or being punished for what he has done wrong.
When the young man starts to earn his own living, he can no longer expect others to pay for his food
A. will have little time playing
B. has to be successful in finding a job
C. can still ask for help in time of trouble
D. should be able to take care of himself