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7.Upon arriving home,I was surprised to find the paper I had had _____ was missing.(  )
A.to be preparedB.to prepareC.preparingD.prepared

分析 一到家我就惊讶地发现我准备好的论文不见了.

解答 答案:D
题干中I had had作paper的后置定语,是一个定语从句,连接词that省略了;句中had had是使役动词have的过去完成形式;句中prepare与paper之间构成动宾关系,要用被动;have sth done让某物被怎样,即I had had the paper prepared.故选D.

点评 非谓语动词是常考的语言点.有三种构成方式:现在分词表示主动和进行的动作;过去分词表示被动和完成;动词不等式表示未发生的动作.学习时,要注意区分和掌握.

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