I often warn children ____ in the deep river.
| A．to not swim | B．not to swim |
| C．not swimming | D．not swam |
After a long walk, the old man be tired now.
| A．can’t | B．must |
| C．has to | D．need |
You ________ worry about him. He will get well soon.
A. needn’t B. can’t C. mustn’t
---Must I return the magazine to you right now, Sandy?
---No, you _____.You may keep it until next Wednesday.
| A．needn’t | B．can’t | C．must | D．may |
---This pair of shoes ____ belong to Jack. He likes this kind very much.
--- It ____ be his. It’s too large for him.
| A．can; can’t | B．may; needn’t |
| C．must; mustn’t | D．must; can’t |
The news he told us_______ be true because he is an dishonest person.
| A．can't | B．wouldn't | C．needn't | D．mustn't |