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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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 |