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...