С, нужно праыильно выбрать. 1.you must/needn not stop at the red light 2.pilots have to /can not wear a uniform 3.you must not/ don not have to water the plants. i ll do that 4. he is i ll. he must/ has to see a doctor 5. you must not/ don not have to eat in the classroom. it is not allowed 6/ he has to/can not do his homework every day.
1. MUST
2. HAVE TO
3. DON'T HAVE TO
4. HAS TO
5. MUST NOT
6. HAS To
Если надо-могу объяснить в личке если тут есть такое. Я только что зарегался.
1. must
2. have to
3. have to
4. has to
5. mustn't
6. has to
вроде так.