2. I understand - you don't have to explain everything again
3. You mustn't eat in class - -It's a school rule
4. Hurry up, Sally! - we mustn't miss the bus.
5. My sister's revising for her exams, so she doesn't have to do any housework
6. Mum and dad told us we mustn't get home later than midnight.
sper ca am ajutat =]]
