Choose the correct item. 1.Zarina doesn't have to/has to run for the train because she's early. 2.You don't have to/mustn't buy a bus ticket- I'll buy for you. 3.I mustn't/have to get on the number 18 bus, or I'll be late for work.
1.Zarina doesn't have to...
2.You don't have to...
3.I have to get...