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3.Simon is very regretful.If he had been more careful,he _____ such a big mistake.(  )
A.hasn't madeB.hadn't made
C.won't have madeD.wouldn't have made

分析 Simon很遗憾.如果他更细心一点,他就不会犯这么大的错误了.

解答 答案是D.本题考虚拟条件句.与过去事实相反的虚拟条件句中往往用过去完成时,相应的主句中用"would/should/could/might+have done";由从句中的had been判断是与过去事实相反,由此判断答案是D.

点评 在掌握虚拟语气的规则的基础上,判断题干属于什么类型的虚拟,然后根据语境,选用恰当的动词形式表达虚拟.

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