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    The government has taken more measures to prevent the H1N1 flu from spreading, but it may still be some time it is completely under control. A. since B. after C. unless D. before 【查看更多】

     

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    The government has taken more measures to prevent the H1N1 flu from spreading, but it may still be some time ________ it is completely under control．

    [　　]

    A．after

    B．unless

    C．since

    D．before

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