5C.
a)
0. I don't have to work on Saturday.
1. Jane has to work very hard.
2. Do you have to wear a uniform?
3. My sister does not have tot go to school.
4. Do I have to finish this now?
5. We don't have to get up early tomorrow.
6. does Harry have to work tomorrow?
7. We have to hurry or we'll be late.