A Ask and answer（根据提示进行问答）
look for a zebra crossing play football on the road
look at the traffic lights play on the zebra crossing

S1: To cross the road safely, what must/mustn’t you do?
S2: I must/mustn’t ...

略

B Listen and circle（听录音，圈出正确的图片）
1 a b
2 a b
3 a b
4 a b
5 a b
6 a b

1 b 2 b 3 a 4 a 5 a 6 b

C Read, think and complete（根据句意及首字母提示补全句子）
1 The park is far. You can t__________ the bus.
2 When the light is red, you m__________ stop.
3 Here’s a school. Some s__________ are crossing the road.
4 You m__________ talk loudly in the library.

1 take 2 must 3 students 4 mustn’t

D Read and transform（按照要求改写句子）
1 Don’t turn left here.（改为同义句）
We __________ turn left here.
2 Helen cannot find a zebra crossing near her.（改为肯定句）
Helen __________ find a zebra crossing near her.
3 You must walk quickly.（改为否定句）
You __________ __________ __________.
4 You mustn’t run on the road. You mustn’t skate on the road.（将两句合并为一句）
You __________ __________ or __________ on the road.

1 mustn’t/can’t/shouldn’t 2 can 3 mustn’t, walk, quickly 4 mustn’t, run, skate