Research shows that children who are exposed to secondhand smoke are sick more often than children who live in homes where no one smokes and that the children of smokers are more than twice as likely to develop lung cancer when they are adults as the children of nonsmokers. The risk is even higher for children who live in homes where both parents smoke.

　　___75

　　As a result，they have passed laws which prohibit people from smoking in many public places. A. Recently，though，scientists changed their opinion after they studied a large group of nonsmokers.

　　B As a matter of fact，almost all of US breathe tobacco smoke at times，whether we realize it or not.

　　C In fact，many people who smoke get lung cancer.

　　D However, secondhand smoke is dangerous to all people，old or young.

　　E. People are becoming very aware of the dangers of secondhand smoke.

　　F This smoke is called secondhand smoke.

　　G. Many people, including doctors, parents, teachers, and others, are concerned about the health risks of cigarette smoking.

　　第四部分：书面表达

　　第一节（15分）

　　假设你是育才中学学生会主席李华。你校将举办一次英语演讲比赛（speech contest），希望附近某大学的外籍教师Smith女士来做评委。请参照以下比赛通知给她写一封信。

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