—Look! The boy in the white shirt ___be Tom.
--It ____be him. I saw him enter the library just now.
A. must; can’t B. must; mustn’t
C. may; shouldn’t D. may; mustn’t
Students should do everything they can __their study.
A. improve B. to improve
C. improving D. improved
If you are a little careful, I think you can _____the problem.
A. get over B. get in C. get on D. get off
Joan writes ____than she did 2 years ago.
A. much more careful B. more careful
C. much carefully D. more carefully
—The pollution problem here seems to get more and more serious.
--Yes. Something_____about it.
A. must do B. must be done
C. is doing D. had been done
When I got to the cinema, the movie ___for 15 minutes.
A. began B. had been on
C. had begun D. has begun
