题目内容

20.Scarcely had they settled themselves in their seats in the theatre ______ the curtain went up.(  )
A.thenB.beforeC.whenD.then

分析 他们在剧院一坐下,幕布就升起了.

解答 答案:C 考查时间状语从句.A项:then在那时;B项:before,在---之前;C项:scarcely had+完成时+when+一般过去时,意为"一…就"与"no sooner…than…意思相同,是固定搭配;D项:then在那时.根据句意.C项符合题意.

点评 状语从句由从属连词引导,从属连词在句中不充当句子成分,只起连接作用,状语从句放在句首时,要用逗号,放在句尾时不用.弄清楚各个从属连词的用法,然后根据题意选择最符合题意的选项.

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