the sign on the wall means "No----".We shouldn't ----here.a.smoking,smoke b.smoke,smokeing c.smo
问题描述：
the sign on the wall means "No----".We shouldn't ----here.a.smoking,smoke b.smoke,smokeing c.smo
答
A smoking,smoke
No+ V-ing 表示“禁止.”
should 是情态动词,应接动词原形
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