Ответ:

1 In Britain, students don’t have to

leave school when they are 16. Some stayuntil they’re 18.

2 We have to be quiet in the

library.

3 She can take the exam again next year.

She must be upset.

4 Students should work hard at

school to get good marks.

5 We must go to all of our lessons.

6 My school mustn’t have so many rules. It’s too strict.