题目内容

We first met on a train in 2010,but we both felt immediately that we ________ each other for years.

A.knew B.have known
C.had known D.know

C

解析根据题干所提供的信息,首先弄清说话者在谈论过去的事情,因此用过去时,排除B、D两项,然后考虑动词know在felt之前,即过去的过去,因此用过去完成时。

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