1. There was a fire, but we were able to stop it quite quickly.
2. I have to stay late tonight because I have a lot of work to do.
3. According to the contract, the goods are to arrive tomorrow.
4. You needn’t hurry, there’s plenty of time.
5. We had to get up early yesterday to catch our train.
6. You must visit us when you are in Moscow.
7. Where’s she? – She might be in her room.
8. I must have left my umbrella in that bakery.
9. You shouldn’t have danced so much at the party.
10. I think you ought to follow his advice.
11.pupils must respect teachers(ученики дожны уважать учителей)
12.pupils must do their homework(ученики должны делать домашнюю работу)
13.pupils must wear school uniform(ученики должны носить школьную фому)
14.pupils must not use mobile telephones on lesson(ученики не должны пользоваться телефоном на уроке)
15.pupils must not talk with each other at a lesson(ученики не должны разговаривать на уроке друг с другом)
16.teachers must know their subject very well(учителя должны знать хорошо свой предмет)17.teachers must not give a lot of homework(учителя не должны давать много домашней)
18.teachers must respect their pupils(учителя должны уважать учеников)
19.teachers have to help pupils(учителя должны помогать ученикам)
20.teachers must not scrеam at the top of their voices(учителя не должны повышать голос)