题目内容
Nowadays, there arises growing concern over the issue of tainted vaccine(被感染的疫苗) ________ around China.
A. swept B. sweeping
C. to sweep D. having swept
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题目内容
Nowadays, there arises growing concern over the issue of tainted vaccine(被感染的疫苗) ________ around China.
A. swept B. sweeping
C. to sweep D. having swept