prohibici SIS 1 Choose the correct option. You don't have to / must be quiet in the library. People are studying! 1 You have to / mustn't have a passport to travel abroad. 2 People mustn't I need to travel on public transport without a ticket. 3 We didn't have to I needed to get up early yesterday, because there was no school. 4 You don't have to / must finish your homework. The teacher wants to check it tomorrow 5 You mustn't need to wear trainers for PE lessons.