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    I would have come sooner, but I that you were waiting. A．didn't know B．know C．hadn't known D．haven't known 【查看更多】

     

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    －Hi, Sam! You are late.

    －Sorry, I would have come sooner, but I ________ that your were waiting.

    [　　]

    A．didn't know
    B．don't know
    C．hadn't known
    D．haven't known

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