Smoking, which may be a pleasure for some people, is a serious source of discomfort for their fellows. Further, medical authorit

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问题     Smoking, which may be a pleasure for some people, is a serious source of discomfort for their fellows. Further, medical authorities express their【C1】______ about the effect of smoking on the health not only【C2】______ those who smoke but also of those who do not. In fact, non-smokers who must【C3】______ inhale the air polluted by tobacco smoke may suffer more than the smokers themselves.
    As you are doubtless【C4】______ , a considerable number of our students have joined in an effort to【C5】______ the university to ban smoking in the classrooms. I believe they are entirely right in their aim.【C6】______ , I would hope that it is possible to achieve this by【C7】______ the smokers to use good judgment and show concern for others rather than by regulation.
    Smoking is【C8】______ by city by-laws(地方制定的规章)in theatres and in halls used for showing films as well as in laboratories where there may be a fire hazard. Elsewhere, it is up to your good sense.
    I am【C9】______ asking you to maintain "No Smoking" in the auditoriums, classrooms and seminar rooms. This will prove that you have the non-smokers’ health and well-being【C10】______ , which is very important to a large number of our students.
【C8】

选项 A、prohibited
B、stopped
C、suppressed
D、prevented

答案A

解析 空格处要求填入一个过去分词,与is构成被动语态。这一动词的逻辑主语为后面的city by—laws(城市地方规章)。由这一主语可知,谓语动词应选A项prohibited(禁止)。B项stopped(制止,停止)、C项suppressed(压制,抑制,查禁)和D项pre一vented(防止,阻止),均不合句中要求的意思。
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