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.