I want to know ________ you will come back at 8:00 tomorrow.
-----What’s your hobby? -----I _______ listen to music, but now I enjoy dancing. A. am used to B. used to C. am used
----_______ do you brush your teeth? ----- Twice a day. A .How much B. How often C. How long
I _____ ask my father to give up smoking. It’s bad for his lungs. A. must B. needC. shouldn’t
It’s cold outside, you’d better not _____ out. A. to goB. go C. going
Why _______ climb mountains this weekend? A. don’t B. didn’t C. not