( )1. I didn’t go to bed ______my father came back.
A. if B. while C. until D. or
( )2. ----What does CCTV _____?
----China Central Television.
A. stand for B. turn down C. look after D. leave for
( )3. ----_____do you go swimming ,Tony?
----Twice a week.
A. How long B. How often C. How soon D. How much
( )4. You’d better _____ the window right now.It’s a little cold here.
A. not opening B. not open C. open not D. not to open