题目内容
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
C
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题目内容
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
C