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MyfriendfromtheUK.ShestudiedatOxfordforfouryears,duringwhichwecommunicatedwitheachotherontheInternet.A.steppedB.hasreturnedC.wentD.haslearned

题目详情
My friend ______ from the UK. She studied at Oxford for four years, during which we communicated with each other on the Internet.
A.stepped B.has returned C.went D.has learned
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答案和解析
B