Complete the sentences with mustn't or don't have to. 1. You ____ show Peter that spider — he's got arachnophobia. 2.

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 tomorrow.