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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1867

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