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题目
Tom () his homework yesterday,because he was in hospital all day.
A.can't finish B.couldn't finish C.couldn't have finished D.mustn't finish
选哪一个呢?
我也选的C,但是是感觉。

提问时间:2020-10-16

答案
答案是C,表推测:汤姆昨天不可能完成作业了,因为他昨天住院了.
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