问题
选择题
Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of American households
had it.
A．before
B．when
C．after
D．until
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of American households
had it.
A．before
B．when
C．after
D．until
答案：A