нужно преобразовать активный залог в пассивный!
1. They gave a party yesterday.
2. They sent cards of congratulations to all their friends.
3. She washed all the dishes an hour ago.
4. People used the Tower of London as a prison.
5. They built the bridge last year.
6. Their friend recommended a new doctor to them.
1.A party was given by them yesterday.
2. Cards of congratulations were sent by them to all their friends.
3.All the dishes was washed by her an hour ago.
4.The Tower of London was used by people as a prison.
5. The bridge was built by them last year.
6. A new doctor was recommended by their friend to them .
Объяснение: