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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 350

He _______ English for four years before he went abroad.

A.has studied B.was studying
C.has been studying D.had been studying
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HeEnglishforfouryearsbeforehew