II．单项填空（共15小题；每小题1分，满分15分）
21.---I’m afraid I must be off now .
--- ____________________ .
| A．No problem | B．Never mind | C．Step slowly | D．See you soon. |
The doctor told Sara to ____ on smoking but she just couldn’t.
| A．take down | B．set down | C．cut down | D．turn down |
The project will cost a lot of money but it will ____ the company in the long run.
| A．limit | B．harvest | C．benefit | D．celebrate |
His ____ as captain of the football team lies in his ability to gain the respect of his men.
| A．weight | B．strength | C．energy | D．balance |
Don’t take a chance! Our teachers won’t have you ____ cheating in the exams.
| A．getting away with | B．getting along with |
| C．getting rid of | D．getting interested in |
I am not feeling myself today! We ____ have drunk that much beer last night.
| A．mustn’t | B．couldn’t | C．needn’t | D．shouldn’t |