题目内容
【题目】By the time the teacher _______ back, we ________ the thorough cleaning.
A. came, have finished B. comes, have finished
C. will come, will have come D. comes, will have finished
【答案】D
【解析】句意:到老师回来为止,我们将会完成彻底的打扫工作。根据句意可知,老师回来是将来,在时间状语从句中,从句用现在表示将来,主句用将来,此句根据语境要用将来完成时,故选D。
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