I. 用must，have to 和 mustn’t的正确形式填空。

1. To buy a ticket, you _____ line up at this window.

2. To get to the train, you _______ put your ticket in this machine here.

3. Don’t stand close to the tracks. You _______ stand behind this yellow line.

4. You _______ take animals on the subway. It’s against the rules.

5. You ______ give rides to other people. It’s dangerous.

 

II. 完成句子。

1. 过马路时要走斑马线。

When you _____ ____ ______, you ____ ______ cross it at a zebra crossing.

2. 他妈妈病了，他得在家照顾她。

His mother is ill. He ____ _____ look after her at home.

3. 每个司机都要有驾驶执照。

Every driver ____ ______ a driver’s license.

4. 不准在街上踢球，很危险。

You _____ ______ ______ in the street . It is dangerous.

5. 在路上开车时，一定要等交通灯。

When you drive along the road, you ____ _____ for the traffic lights to change.

6. 红灯亮时，一定要停车。

When the traffic lights ___ ___, you ____ ______ your car.

7. 他感冒了，他必须休息。

He has a bad cold, he _____ have a rest.

8. 在学校我们一定要穿校服。

At school, we               wear uniforms.

 

I. 1. have to   2. must   3. must    4. mustn’t    5. mustn’t

II. 1. cross the road, have to   2. has to     3. must have    4. mustn’t play football

  5. must wait   6. turn red, must stop    7. must     8. have to