C Look and say
1
How can we cross the road safely?

　　　　　　　　　　　　　
We must ...
2
What mustn’t we do on the road?

We mustn’t ...

D Read and write
1 There are many busy r________ in the city.
2 When you cross the road, you must look for a z________ c________ first.
3 Here is the g________ m________. We can cross the road now.
4 It is safe to walk on the p________.
5 T________ l________ help us cross the road safely.