1.I work in a shop, and I [ ]be very polite to the customers. 2.You [ ]smoke in the garage-it’s dangerous. 3.At work we are [ ]have a tea break in the morning and afternoon. 4.It’s my sister’s birthday tomorrow-I [ ]get her a card. 5.I’m a teacher, so I [ ]wear a uniform at work. [1]-> [don’t have to / allowed to / mustn’t / have to / must]