Ответ:
1. Farmers have to work all the year round.
2. You must not make noise in hospital.
3. May I switch the kight on?
4. My wife can cook quite well.
5. You must not wear jeans to school.
6. You didn't have to drink so much yesterday.
7. We should find a better job.
8. You shouldn't eat too much sugar and salt.
9. Do I have to get a visa to Turkey?
10. He needs to improve his manners.