—May we leave the classroom now?—No , you ____.You ____to leave until the
题型：同步题难度：来源：
—May we leave the classroom now?
—No , you ____.You ____to leave until the bell rings. |
| [ ] |
A. mustn"t; are allowed
B. don"t have to ; are supposed
C. needn"t; aren"t allowed
D. can"t ; aren"t supposed |
答案
| D |
举一反三
—Mr. Wang , must I come again on Sunday morning to clean the window ?
—No, you _______. I have asked others to do it. |
| [ ] |
A. don"t have to
B. mustn"t
C. can"t
D. shouldn"t |
| Boys and girls , don"t forget your report. It ____ today. |
| [ ] |
A. can"t finish
B. can"t be finished
C. should finish
D. should be finished |
| Mrs Smith ________ be at home now. She flew to Hainan this morning. |
| [ ] |
A. mustn"t
B. can"t
C. may not
D. needn"t |
| Look out! The knife is very sharp. You ________ cut your finger. |
| [ ] |
A. must
B. should
C. may
D. need |
—Can I park my car here?
—Sorry ! You do it. No parking is allowed here. |
| [ ] |
A. may not
B. don"t
C. won"t
D. mustn"t |
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