一 用must, mustn't, can, can't填空。
1. It's cold. You ________ open the door.
2. —________ we wait for them together?
—No, you needn't.
3. The hole is too deep and he ________ reach it.
4. You ________ run or shout in the classroom. You ________ keep quiet.
5.（深圳期末真题）In this school, all students ________ wear school uniforms on Monday.
6. People ________ smoke in the forest.
7.（常州期末真题）—________ I go to see the doctor? —Yes, you ________. You ________ go to school because you're sick.
8.（徐州期中真题）—Why does the bus stop here? —Look at the red light. It means we ________ cross the road.

1. can't 2. Must 3. can't 4. mustn't/can't; must 5. must 6. mustn't 7. Must; must; can't 8. mustn't

( )1. My ruler is green. This red one ________ be Mike's.
A. could B. cannot C. mustn't

1. A

( )2. —Must we do our homework first?
—No, you ________. You may have a rest first.
A. mustn't B. needn't C. can't

2. B

( )3. —________ I watch TV?
—No, you can't. It's late. You ________ go to bed now.
A. Must; must B. Can; can C. Can; must

3. C

( )4. I ________ run fast. But I ________ run on the road.
A. can't; mustn't B. can; must C. can; mustn't

4. C

( )5. —Why ________ we swim in the river?
—Can't you see the sign “No swimming”?
A. can B. can't C. do

5. B