Mark these sentences: true or false. 1. your cllassmates don*t have to get up early on sunndays. 3. you mustn*t learn german. 4. your friends will have to take exams next. 5. your teacher mustn*t check your homework today. 6. old people don*t have to work. 7. people have to walk their dogs.
3) f
4) t
5) f
6) t