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    The snow has come down so heavily at times; it rescuers from searching for missing people. A. is delaying B. has delayed C. had delayed D. will delay 【查看更多】

     

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    （2010·湖南湘潭市外国语学校届高三第二次月考）      30. The snow has come down so heavily at times; it _____ rescuers from searching for missing people.

    A. is delaying        B. has delayed              

    C. had delayed             D. will delay

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