Exercise on Passive Voice - Simple Past

Rewrite the sentences in passive voice.

1. She sang a song. -
2. Somebody hit me. -
3. We stopped the bus. -
4. A thief stole my car. -
5. They didn't let him go. -
6. She didn't win the prize. -
7. They didn't make their beds. -
8. I did not tell them. -
9. Did you tell them? -
10. Did he send the letter? -