They will telephone the police and complain about it the noise .A．if; stopsB．unless; stopsC．if not; stopsD．unless; doesn’t stop 题目和参考答案——青夏教育精英家教网—

题目内容

They will telephone the police and complain about it the noise .

A．if; stops

B．unless; stops

C．if not; stops

D．unless; doesn’t stop

解析试题分析：根据题干，本句的意思是“如果噪音不停止，他们就打电话报警抱怨。”如果用if的话，应该用if the noise doesn’t stop，故AC排除；unless是“除非”的意思，等于if……not，其后面的句子不能再用否定形式。所以本题选B。
考点：本题考查条件状语从句的用法。
点评：要完成本题需要对unless的用法熟练掌握，unless等于if……not；条件状语从句的用法是：如果主句用将来时，则从句应该用一般现在时。

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