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【题目】Teenagers______to smoke in public.

A. allowB. don’t allowC. aren’t allowedD. allowed

【答案】C

【解析】

句意:青少年不允许在公共场所吸烟。A为动词原形;B为主动语态;C为被动语态;D为一般过去时,主动语态。Teenagers“allow”之间是被动关系,所以使用被动语态。allow sb. to do sth. 变成被动语态后为:sb. + be allowed to do sth. 故选C

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