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问题: 英语

The bird flu__through Asia has jumped from birds to humans at least 20 times so far,__16 people.
A.sweeps;killed
B.swept;killing
C.sweeping;to kill
D.sweeping;killing

解答:

The bird flu_D__through Asia has jumped from birds to humans at least 20 times so far,__16 people.
A.sweeps;killed
B.swept;killing
C.sweeping;to kill
D.sweeping;killing
sweeping:现在分词作定语,谓语动词为主动的定语从句,killing非谓语动词作伴随状语,和has jumped同时发生