1. My father cleaned the room last night.
The room.........
2. Mary planted that tree yesterday.
That tree.............
3. We wrote those exercises last week.
Those exercises...........
4. I sent that letter two days ago.
That letter..........
5. They bought that house last year.
That house...........
6. They saw John near the platform two hours ago.
John............
1. My father cleaned the room last night.
The room..was cleaned by my father last night.......
2. Mary planted that tree yesterday.
That tree......was planted by Mary yesterday.......
3. We wrote those exercises last week.
Those exercises.....were written by us last week......
4. I sent that letter two days ago.
That letter......was sent by me two days ago....
5. They bought that house last year.
That house.....was bought by them last year......
6. They saw John near the platform two hours ago.
John......was seen near the platform by them two hours ago......