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    It’s a serious problem. We can’t decide Mr. Harris comes back. A. while B. since C. until D. after 【查看更多】

     

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    It's a serious problem. We can't decide _____ Mr Harris comes back.

    [     ]

    A. while
    B. since
    C. until
    D. so

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    It’s a serious problem．We can’t decide________ Mr. Harris comes back．

    A．while        B．since             C．until         D．so

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    It's a serious problem．We can't decide ________ Mr Harris comes back．

    [　　]

    A．while

    B．since

    C．until

    D．so

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