Complete the sentences with mustn't or don't have to.
1. You ____ show Peter that spider — he's got arachnophobia.
2. We ____ go to school on Saturdays.
3. You ____ tell her — it's a secret.
4. You ____ bring mobiles to class — it isn't allowed.
5. I ____ go to bed early — there's no school tommorow.

1. You mustn't show Peter that spider — he's got arachnophobia.2. We don't have to go to school on Saturdays.3. You mustn't tell her — it's a secret.4. You mustn't bring mobiles to class — it isn't allowed.5. I don't have to go to bed early — there's no school tommorow.