I would have come sooner but I ______ that you were waiting.A、haven’t knownB、ha

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问题 I would have come sooner but I ______ that you were waiting.

选项 A、haven’t known
B、hadn’t known
C、didn’t know
D、have known

答案 C

解析前句是虚拟语气，but引出真实情况，即过去不知道的事情，故用过去时。

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