6 - Grammar
Exercise
7
Completa le frasi con mustn't o don't/doesn't have to.
Solution
- You mustn't tell Sam, it's a surprise!
- I've got the tickets. You don't have to buy them.
- Be quiet! You mustn't talk in a library!
- Jack doesn't have to get up early on Sunday.
- Beth doesn't have to do housework. Her parents do it.