Вставьте глагол have to или don't have to в пропуски. 1. Children ... go to school. 2. Adults ... go to school, but they ... go to work. 3. Old people ... go to work. 4. Teenagers ... study for exams.
1) have to, 2) don't have to, but they have to, 3) don't have to, 4) have to.