---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 |
— Shall I open the window to let some fresh air in? —No，________ .
| A．I’d rather not | B．I’d rather you not |
| C．I’d rather you didn’t | D．I’d like not to |
If you don’t know that _____ is the mother of success, you are sure to be _____ in life.
| A．failure; failure | B．a failure; a failure |
| C．a failure; failure | D．failure; a failure |
It is everyone’s duty to ______the rules of our school.
| A．watch | B．observe | C．notice | D．see |
It is very ______ that she will ring me tonight.
| A．likely | B．possibly | C．probably | D．perhaps |
I regret ______ you that my daughter has already regretted ______ out with you. So leave her alone and don’t bother her any more.
| A．telling; dating（约会） | B．to tell; to date |
| C．to tell; dating | D．telling; to date |