Cable TV began in 1948 in the USA, but it took 50 years________ 66 percent of American households had it.A. before B. after C unless D. since
I feel it an honor ______ to speak here.
Scarcely _____ raining _____ the PLA fighters started on their way again.
He ______ English for six years by the time he takes his examination.
Never _____ forget the days when _____ together with you.
As you are now a member of our society we shall let you ______ our secrets.