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6.I don't know whether you happen            it,but I am going to study in the UK for a year.(  )
A.hearB.to hearC.to be heardD.to have heard

分析 我不知道你是否碰巧已经听说这件事,但是我打算去英国学校一年.

解答 答案是D.本题考查不定式的完成式;题干中happen(碰巧)后面常常接动词不定式,happen to do碰巧做…,故排除A;题干中没有被动的含义,排除C;hear的动作已经发生,故用"happen to have heard碰巧已经听说…",故答案选D.

点评 首先判断选项中的动词在句中是以谓语还是非谓语形式出现,然后根据选项在句中的功能结合非谓语的基本用法做出合理的判断.要关注常见非谓语动词的搭配.

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