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    精英家教网 > 高中英语 > 题目详情
    ——I’m sorry , but there’s no smoking on this flight ．
    ——Oh, I _______that ．Sorry , I won’t again ．
    A．don’t know B．didn’t know
    C．won’t know D．haven’t known
    B
    考查时态。句意：很抱歉，在飞机上不能吸烟。噢，我不知道，对不起，我再也不吸了。说话之前不知道，故用一般过去式。所以选B。
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