1) Who(m) was that poem written by?
2) Who(m) was that picture painted by?
3) How will trains be driven in the future?
4) What are traffic jams caused by?
5) Where has your car been taken by them?
6) Why was the train canceled?
7) Who(m) had the room been cleaned by?
2.
1) The meeting next week will be changed from Monday to Friday.
2) Cows aren't eaten in India.
3) Harriet eventually found her car. It hadn't been stolen by car thieves.
4) The painting Sunflowers was painted by Van Gogh.
5) The shopping centre will be opened next Monday by the mayor.
6) The Narnia books weren't written by J K Rowling.