Complete sentences 1-4 with must or mustn't and an appropriate verb. 1) You... a crash helmet when you ride a motorbike.

1) You must wear a crash helmet when you ride a motorbike. 2) You mustn\'t drive in the cycle lane. 3) You mustn\'t drive at more than 60 kph in a city. 4) You must stop when the traffic light is red.

\"A cycle lane\" значит \"дорожка для езды на велосипеде\".