---Did you _____ who cleaned the classroom? ---Yes, Sam did. A. find out B. look for C. put out
I find it hard ____ to drive a car.A. to learn B. learning C. Learns
How long ____ his grandfather ____ ?A. has, been deadB. has, diedC. did, die
We’d better ____ out .It’s going to rain.A. not to go B. don’t go C. not go
Shanghai is a beautiful city. I _____ there twice .A. went B. have gone C. have been
He used ___ in the morning , but now he gets used _____ after supper.A to study, studyingB. to study, to studyingC. to studying , to study