Ex. 7/c, page 71
- Great! I’m under 12! I don’t have to pay!
- Great! No school today — I don’t have to get up early.
- OK, you can keep it — but it mustn’t leave this room.
Ex. 7/d, page 71
- You really must see that film! It’s great!
- My parents mustn’t go to work tomorrow, because it’s a public holiday.
- My sister doesn’t have to go to school yet because she’s only three.
- Hurry up! We mustn’t be late again.