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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1055

A number of students ______ playing on the ground but I don't know what the exact number______.

A.are; is B.are; are C.is; is D.is; are
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Anumberofstudentsplayingontheg