1. Maria has to / needs be back home by midnight. 2. You mustn't/ don't have to eat if you aren't hungry.
3. You've got all day tomorrow to work on the project. You mustn't/ don't need to finish it tonight
4. Sheila must have to take her medicine.
5. You needn't/ don't have cook. We're eating out tonight.
6. We need / must to buy bus tickets.
7. I don't have school tomorrow so I mustn't/ don't have to get up early.
8. Thanks a lot for the present, but you had to / didn't have to buy me anything.
9. You mustn't/ don't have to run in the museum.