Since the 1980s, with satellite TV and the Internet, it possible to listen to British and American English at the flick of a switch.
A. was
B. had been
C. has been
D. was to be
网友回答
A. was
B. had been
(答案→)C. has been
D. was to be
解析：考查时态：句意：自从20世纪80年代以来,随着卫星电视和因特网的使用,非常便捷地听到英式英语和美式英语已经成为可能. at the flick of a switch:轻轻一按电源;形容便捷。时间是Since the 1980s,和现在完成时连用，选C。