Choose the correct option: 1) You mustn't / have to / don't have to touch that. It's hot! 2) You mustn't / have to / don't have to buy the tickets online. There isn't a phone number. 3) You mustn't / have to / don't have to put the knife in your mouth when you eat. It's dangerous and rude! 4) We mustn't / have to / don't have to get the early train. The lessons start later today. 5) In the race, first they mustn't / have to / don't have to swim a long way, then cycle! 6) We mustn't / have to / don't have to bring dictionaries to school. There are lots in the classroom. 7) Shh! Be quiet! You mustn't / have to / don't have to talk during the exam. 8) It's OK, you can go. You mustn't / have to / don't have to wait for me — I can come later.

1. You mustn't touch that. It's hot!
   Нельзя это трогать. Оно горячее!
2. You have to buy the tickets online. There isn't a phone number.
   Тебе нужно купить билеты онлайн. Номера телефона нет.
3. You mustn't put the knife in your mouth when you eat. It's dangerous and rude!
   Нельзя класть нож в рот во время еды. Это опасно и невежливо!
4. We don't have to get the early train. The lessons start later today.
   Нам не обязательно ехать на раннем поезде. Сегодня уроки начинаются позже.
5. In the race, first they have to swim a long way, then cycle!
   В гонке сначала им нужно проплыть большое расстояние, а потом ехать на велосипеде!
6. We don't have to bring dictionaries to school. There are lots in the classroom.
   Нам не нужно приносить словари в школу. В классе их много.
7. Shh! Be quiet! You mustn't talk during the exam.
   Тсс! Тихо! Нельзя разговаривать во время экзамена.
8. It's OK, you can go. You don't have to wait for me — I can come later.
   Всё хорошо, можешь идти. Тебе не нужно меня ждать — я могу прийти позже.

Правило: mustn't означает запрет, have to — необходимость, а don't have to — отсутствие необходимости.