Какова тема Ревизор??помогите пожолуйста!!

Change into passive. 

1. They must visit Mr. Grey in the morning.
2. He will speak to his cousin tomorrow.
3. They often give her fruits from their garden.
4. They built a new hospital last year.
5. She is reading a book at the moment.
6. When Jack came his sister was prearing supper.
7. I have done my homework. How i can go for a walk.
8. He will look after his brother next week.
9. Pupils didn't visit the boy last week.
10. We don't translate poems at home. 

Trafalgar , I , never , to ,been , Square , have