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

【解析】

試題分析：句意：他一定是完成了他的工作，否則他不會(huì)在海邊玩得那么開心。A. must have completed對(duì)過去的肯定推測(cè)；B. should have completed本應(yīng)該完成，實(shí)際上沒完成；C. ought to complete應(yīng)該完成；D. must complete必須完成。表示對(duì)現(xiàn)在的推測(cè)。故選A。

考點(diǎn): 考查情態(tài)動(dòng)詞表推測(cè)的用法。

 

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