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题型:单选题 题类:常考题 难易度:普通

【五三】鲁教版(五四制)初中英语七年级上册Unit 4 What did you do last weekend Self Check

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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