1. The message was written by two people.
2. The armchair was sold by two people.
3. The airballoon was lost by two people.
4. Two letters was answered by people.
5. The milk was drinken by people.
6. The person was met by people.
7. Two pictures was showed by two people.
8. Two hats was woren by people.
9. Two bicycles was left by people.
10. The book was read by people.
You are welcome.