______you were coming today, I’d have met you at the airport.A、Have I knownB、I

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问题 ______you were coming today, I’d have met you at the airport.

选项 A、Have I known
B、I have known
C、Had I known
D、I had known

答案 C

解析虚拟语气。if引导的非真实性条件状语从句，表达与过去事实相反的假设情况时，从句动词结构使用过去完成时，主句动词使用would+have done。如果从句连词if省略，则呈倒装语序。

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