Change into passive voice

Change into passive voice 

1.They have just painted those posters

-] Those posters.......

2.The builders were building a new bridge 

-] A new bridge .........

3. Ba is preparing a report now

-] A report...........

4.Some one was making coffee when I came

-] Coffe...........

5. No one has changed the room

-] The room ...........

6. Are they mending your shoes at tha moment ? 

-] Your shoes............

7. They haven't bought the flowers yet 

-] The flowers............

8.People are laughing at him 

-] Him..........

9. Some body was recording our conversation

-] Our conversation..........

10.We have seen her sice last week

-]  Her .........

11. Bill is using the computer at the moment 

-] The computer...........

12. Doctors have treated many people for burn

-]...........

13.People were watching the match on TV

-]..........

14.Nobody has stolen his watch

-]...........

15. Do they make these cakes ?

-]

16.They have just built a new church near my house

-].......