The water in the river nearby will be dirtier than before if nothing __________.
| A．has done | B．will be done |
| C．is done | D．was done |
Now the air in Yancheng is _______ than it used to be . Something must be done to stop it .
| A．very good | B．much better |
| C．rather bad | D．even worse |
Miss Liu is _________ English teacher. She teaches _______ English very well.
| A．us, we | B．our, we |
| C．we, us | D．our, us |
_______ bad weather ! I can do nothing but to stay in bed for the whole day.
| A．What a | B．How a |
| C．What | D．How |
---How long did it _____ you to work out the difficult maths problems?
---I ______ about half an hour on it .
| A．take ; took | B．spend ; took |
| C．spend ; cost | D．take ; spent |
It is very _______ of you to speak in front of all those people .
| A．polite | B．honest |
| C．funny | D．brave |