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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1080

Since the 1980s, it ______ possible to listen to British and American English at the flick of a switch.

A. is
B. has been
C. had been
D. was
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Sincethe1980s,itpossibletolist