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【题目】To solve the shortage of electricity,the government has taken some measures, but it will be some time________the situation returns to normal.

A.sinceB.whenC.beforeD.unless

【答案】C

【解析】

考查固定句型和从属连词。句意:为了解决缺乏电的情况,政府采取了一些措施,但是也许一段时间以后情况才能恢复正常。A. since自从;B. when当.......时候;C. before在......之前;D. unless除非。“It+be+一段时间+before......”是固定结构,表示一段时间以后某事才发生。before时间状语从句里用一般现在时表示将来时,主句里可以使用将来时或者情态动词。故选C项。

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