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He______ his work, otherwise, he wouldn’t be enjoying himself by the seaside.
A.must have completedB.should have completed
C.ought to completeD.must complete
A

试题分析:句意:他一定是完成了他的工作,否则他不会在海边玩得那么开心。A. must have completed对过去的肯定推测;B. should have completed本应该完成,实际上没完成;C. ought to complete应该完成;D. must complete必须完成。表示对现在的推测。故选A。
考点: 考查情态动词表推测的用法。
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