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        1. The bird flu through Asia has jumped from birds to humans at least 20 times so far, 16. A.sweeps;killed B.swept;killing C.sweeping;to kill D.sweeping;killing 查看更多

           

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          The bird flu ______through Asia has jumped from birds to humans at least 20 times so far,______16.

          A.sweeps;killed            B.swept;killing  

          C.sweeping;to kill            D.sweeping;killing

           

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