In 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 precocious.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 tough, 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, is of prime importance.School rules should forbid smoking by children on the premises.This rule has been introduced at Summerhill School where I spent my schooldays.

There is, however, a risk of children smoking just to rebel against the rules, and even in those schools which have tried to enforce no smoking by corporal punishment there is as much smoking as in other schools.Nevertheless, banning smoking is probably on balance beneficial.Teachers too should not smoke on school premises, at least not in front of children

1、Which of the following is a common characteristic of young smokers？

A、Disobedience

B、Laziness

C、Lack of intelligence

D、Vanity

2、Which of the following is NOT true according to the passage？

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 dissuade adults from smoking.

3、The writer concludes that school rules to forbid smoking().

A、should be introduced, for it really works at the school where he once studied.

B、should not be introduced, for it may cause disturbance.

C、should be introduced though it may not work effectively.

D、needn't be introduced as long as teachers don't smoke in front of children.

4、The author's attitude towards his writing is().

A、objective

B、emotional

C、critical

D、indifferent