Change the sentences. Use must or mustn't.
Пример: You must switch off your phone when you
drive.
1 Switch off your phone when you drive.
2 Don't cross the road when the light is red.
3 Be careful when you cross the road.
4 Walk on the pavement.
5 Don't cycle on the pavement.
6 Fasten your seat belt.
7 Don't drive more than 60 kph.
8 Cycle in the cycle lane.​