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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1727

As early as 1647 Ohio made a decision that free, tax supported schools must be established in every town _____ 50 households or more. 

A.having B.to have C.to have had D.having had
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