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may_____hao to use the modern telephone.A.not to know B.not know C.know not

分类: 作业答案 • 2022-01-09 18:03:39

问题描述：

may_____hao to use the modern telephone.A.not to know B.not know C.know not

答

B 情态动词否定式：情态词+not+动词原形