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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1371

Safety in school has been of great concern because of frequent reports about accidents _______ students got injured or killed while in school .

A.that B.when C.in which D.for which
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Safetyinschoolhasbeenofgreatco