题目内容
三、 用 must,mustn't,can,can't 填空。
1. We look for a zebra crossing.
2. When you see the red man,you cross the road.
3. — I watch TV? — No,you . You go to bed now.
4. In the UK,you be 18 if you want to drive a car.
5. People smoke in the forest.
3. C
三、 1. must 2. mustn't 3. Can,can't,must 4. must 5. mustn't
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