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    精英家教网 > 高中英语 > 题目详情
    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
    B
    考查时态：时间是since the 1980s，和现在完成时连用，句意：自从20世纪80年代开始，在轻弹开关我们一直可以听到英式英语和美式英语。选B。
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