单项选择题

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

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单项选择题

In this passage the author puts an emphasis on（）

A．the effect of smoking among children
B．the difficulty in preventing children from smoking
C．the reasons why children start smoking among children
D．the measures to ban smoking among children

单项选择题

Which of the following is NOT tree 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 persuade adults from smoking.