--Why does the river smell terrible?
--Because large quantities of water__________.
| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
---______, the floor is really slippery.
---Thank you for reminding me.
| A．Mind your step | B．Walk slowly | C．Mind your feet | D．Come this way |
__________ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.
| A．As | B．For | C．With | D．On |
He is no longer in good condition, and his ability to work is limited. I _______ him to give up the job but failed.
| A．suggested | B．persuaded | C．tried to persuade | D．managed |
---Shall I keep an eye on your house when you are on holiday? ---________.
| A．It’s up to you | B．Of course you should |
| C．If you should like | D．I would appreciate that |
The new road is __________ of the old one.
| A．more than three times the length | B．three times more than the length |
| C．more than the length | D．more three times than the length |