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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1323

The professor managed to find some grounds (facts)_________his arguments.

A.to be based on B.to base on
C.which to base on D.on which are based
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Theprofessormanagedtofindsomeg