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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1279

My friend has returned from the UK. She ______ at Oxford for four years, during which we communicated with each other on the Internet.

A.studied B.has studied C.had studied D.has been studying
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MyfriendhasreturnedfromtheUK.S