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    34．A．before B．after C．until D．while 【查看更多】

     

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    It is impolite to leave             the meeting finishes.

    A．after

    B．before

    C．until

    D．while

     

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    It is impolite to leave             the meeting finishes.

    A．after               B．before                 C．until                D．while

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    ________ we were singing happily, he came in．

    [　　]

    A．While

    B．After

    C．Until

    D．Before

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    I met your brother ______ I was walking in the street.

    A．before

    B．until

    C．after

    D．while

     

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    ______ Kathy was watching TV, her mother asked her to go shopping.

    A．Before           B．Until             C．While            D．After

     

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