题目内容

He           have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.
A．shouldB．mustC．wouldn’tD．can’t
B
由句意  “他一定是已经完成工作了；否则, 他就不会在海边玩得那么高兴。”可知是对过去发生事情的肯定推测。
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