3 Choose the correct words. 1 You must / mustn't have a passport to go to the USA. 2 You must / mustn't go to school. 3 You must / mustn't use your mobile when you're driving. 4 You must / mustn't wear a seat belt in a car. 5 You must / mustn't leave a shop without paying. 6 You must / mustn't buy a ticket on a bus or train. Repede!!! Dau coroană !!!