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    A / H1N1 flu virus has threatened the whole world that scientists try to . A. give it up B. make it up C. make it out D. give it out 【查看更多】

     

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     A / H1N1 flu virus has threatened the whole world that scientists try to ______.

       A. give it up       B. make it up     C. make it out     D. give it out

     

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