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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1052

It was nothing but his ten years of hard work that _______ his success in his research.

A.referred to B.applied to C.led to D.appealed to
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Itwasnothingbuthistenyearsofha