--- Will it be sunny this afternoon?
--- It _______ fine. Who knows? The weather (天气) always changes quickly.
| A．must be | B．will be | C．may be | D．maybe |
—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 |