Change the following sentence into passive form 1. What question did they raise in the discussion?
2. They are going to build that bridge in 2018
3. They used to build houses of wood
4. How many trees can we save for every ton of recycled newsprint ?
5. We can make many things from wood
6. If I were you. I wouldn’t accept his invitation
7. They must do it before I come
8. Where do they keep a large collection of books?
9. They can find the books they want in the library
10. What do they keep a large collection of the books for ?

Thank you very much