I knew ________ John Lennon,but not ________ famous one.
The matter____ your fate cannot be taken for granted.
According to a recent U.S. survey, children spent up to 25 hours a week ____ TV.
_____such an embarrassing situation, he didn’t know what to do.
______ those troublesome messages, you’d better not give out your number to anyone whom you don’t know.
--- I wonder if I could pay the bill by check.--- ______. The card machine has just broken down.