Change this sentences from active to passive voice.
1. This jug contains milk.
This hotel serves only vegetarian food.
3. We are renovating all the laboratories.
4. The authorities were setting up a language lab in the school.
5. I will never forgot those happy days.
6. The entire nation observed two minutes silence.
7. The storm had already destroyed many ships.
8. I have downloaded these songs from the net.
9. The police has issued a red slip.
10. The school will hold special classes for weak students.
11. What does Mr. Bhushan teach?
12. Who fed these birds?
13. Has anyone ever opened these boxes?
14. How are you sending the parcel?
15. Which camera did you use to take such a beautiful photograph?
16. How many friends attended your brothers marriage?
17. How much money do you need?
19. Why have ypu taken up this job?
20. Where are they holding the rehearsal?