— Is it helpful to study with a group?— Yes, I think so. ____________, I’ve learnt a lot.
----_______ 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. need C. shouldn’t
It’s cold outside, you’d better not _____ out.A. to go B. go C. going
Why _______ climb mountains this weekend?A. don’t B. didn’t C. not
There _______ a school sports meet next weekend.A. is going to have B. is C. is going to be