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    --I'm sorry, but smoking is not allowed in this section on the train. --Oh, I that, and I won't again. A. don't know B. didn't know C. won't D. haven't known 【查看更多】

     

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    ―I'm sorry，but smoking is not allowed in this section on the train．

    ―Oh，I __________ that，and l won't again．

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

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