Ответ:
Объяснение:
Are they married?
Have they got a big family?
Are you studying at university? (без studying будет выглядеть несколько странно)
8) which
9)must
10) could
11)didn't you
1. must
2. musn't
3. musn't
4. must
5. musn't
6. must
7. musn't
8. musn't
9. must