Выберите подходящий модальный глагол в скобках.

I (must/ has to/ don’t have to) do this today, so I could be free tomorrow.
Sandy (has to/ will must/ must to) go home. Her mum’s called and told her that.
You (don’t have to/ must/ will have to) buy a car. You can ride a bicycle in this town.
I (have to/ doesn’t have to/ has to) pass the examinations to enter the university.