Grammar: Complete the words. Then write rules using must or mustn't.

1. eat or drink in the street. You mustn't eat or drink in the street.
2. wear a crash helmet. You must wear a crash helmet.
3. cycle on the pavement. You mustn't cycle on the pavement.
4. cycle in the cycle lane. You must cycle in the cycle lane.
5. cross the road here. You mustn't cross the road here.
6. keep s... on. You must keep s... on.