He have completed his work; otherwise, he wouldn’t be enjoying himself by the se
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He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.
A. should B. must C. wouldn’t D. can’t
试题答案
B
should have done表示过去应该做而实际并没有做，因此淘汰A项。would不用来表推测，因此淘汰C项。B基与D项虽然都可以表示推测，但B项表肯定意义而D项表示否定推测，意为“不可能”，根据句意可知此处需要肯定意义，因此淘汰D项。