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题目
题型:不详难度:来源:
Nothing can be done _______  he returns.
A.asB.beforeC.whileD.until

答案
D
解析

试题分析:句意:什么都不能做直到他回来。A作为B在...之前C当.....时候D直到。Nothing否定词,什么都没有。before 引导的从句中谓语动词不用否定式。此处相当与not ...until直到....才。。故选D.
核心考点
试题【Nothing can be done _______  he returns.A.asB.beforeC.whileD.until】;主要考察你对从属连词等知识点的理解。[详细]
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