高二英语经典题型(7)

　　13. He ____ have completed his work; otherwise,he wouldn't be enjoying hirnself by the seaside.(2005北京)

　　A. shouldB. must

　　C. wouldn'tD. can't

　　【解析】选A根据下文“否则他在海边没法玩得痛快。”可以推出上一句“他本应该要完成他的工作。”should have done表示后悔或责备，意为“本应该做了(但事实上没做)”。

　　14. I ____ have been more than six years old when the aecident happened. (2005天津)

　　A. shouldn'tB. couldn't

　　C. mustn'tD. needn't

　　【解析】选B“情态动词 + 完成时态”用来表示对过去某一事实的假设或推测。尤其用来表示否定的推测则"can't / couldn't have done"。本句译为：当事故发生时我不可能大于六岁。