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  • 更新 2022-09-04
  • 科目 英语
  • 题型 选择题
  • 难度 中等
  • 浏览 89

It's necessary____ masks(口罩) in public places during the COVID﹣19 period.(  )

A.

for us to wear

B.

for us wearing

C.

of us wearing

D.

of us to wear

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Itsnecessarymasks(口罩)inpublicp