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【题目】It won't be long _our summer vacation begins, but my vacation plans are still up in the air.

A.whenB.untilC.thatD.before

【答案】D

【解析】

考查状语从句。句意:要不了多久我们的暑假就要开始了,但是我的假期计划还没有确定下来。A. when当……时候; B. until直到……;C. that那个;D. before在......之前。结合上文It won't be long可知此处考查句型it will not be long before+句子,表示“要不了多久就……”,before引导时间状语从句。故选D

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