31．With the cell phone available, I can do whatever I want to do and still______in touch with my parents and friends．
| A．stay | B．to stay | C．staying | D．Stayed |
Come and see me whenever _______.
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it will be convenient to you |
Many people agree that_______ knowledge of English is a must in ______
international trade today.
| A．a; 不填 | B．the; an | C．the; the | D．不填; the |
The results of the medical checkup suggested that my father _____ in poor health, so the doctor suggested that he _____ smoking and take more exercise.
| A．was; gave up | B．be; should give up |
| C．should be; gave up | D．was; give up |
As soon as she entered her own room, she caught sight of the gift _____ by her father.
| A．buying | B．bought | C．was bought | D．being bought |
Don’t say any more; we all believe the facts than your words. What you have explained doesn’t make _____.
| A．sense | B．fun | C．use | D．meaning |