Nothing can be done _______ he returns.A．asB．beforeC．whileD．until
题型：不详难度：来源：
| A．as | B．before | C．while | D．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. |
举一反三
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