Transform the following sentences from active to passive voice.
Active
1. Lata sings lovely songs.
2. We did not grow rice.
3. What do you want?
4. They will run a race.
5. Tom is building a house.
6. I was writing a letter.
7. Someone has stolen my purse.
8. She had finished her work.
9. People will admire him.
10. Did no one help you?
11. Will she deliver the message?
12. Respect your elders.