Ex.21.Change the active sentences into passive sentences. Use the words in

Ex.21.Change the active sentences into passive sentences. Use the words in brackets.
Exemple: We sell tickets for all shows at the box office. (Tickets for all shows/sell/at the box office)
Tickets for all shows are sold at the box office.
1. Thomas Edison invented the electric light bulb. (The electric light bulb/invent/by Thomas Edison)
2. Someone will paint the office next week. (The office/paint/next week)
3. Several people saw the accident. (The accident/see/by several people)
4. Where do they make these computers? (Where/ these computers /make)
5. A stranger helped me. (I/help/by a stranger)
6. They don't deliver the post on Sundays. (The post/not/deliver/on Sundays)