6. Some drunk drivers caused the accident in this city.
→ The accident was caused in this city (by some drunk drivers).
7. Tom will visit his parents next month.
→ Tom’s parents will be visited (by him) next month.
8. The manager didn’t phone the secretary this morning.
→ The secretary wasn’t phoned (by the manager) this morning.
9. Did Mary this beautiful dress?
→ Was this beautiful dress bought by Mary?
10. I won’t hang these old pictures in the living room.
→ These old pictures won’t be hung in the living room (by me).
11. The German didn’t build this factory during the Second World War.
→ This factory wasn’t built (by the Greens) during the Second World War.