1. I _have to_ get up at 6.30 on school days.
2. A vet ___has to__ learn a lot about animals.
3 My parents __had to___ borrow a lot of money when they starred their business.
4 a) ___Do___ football referees ___have to__ learn a lot of rules ?
b)Yes,they __do____.
5. I __did __(not) have to study very hard when I was at school.
6 a) ___Did__ he ____have to__ work last night ?
b) No, he __did not___.
7. Rob___does__(not) have to go to school today because it's holiday.