______ you were coming today, I would have picked you up at the station.

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问题 ______ you were coming today, I would have picked you up at the station.

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

答案A

解析 省略if的虚拟语气,句子应倒装,把had提前。本句原来形式为If I had known...。
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