Use the passive voice in the following sentences: 1. they wrote him a letter. 2. they sold us the house very cheap. 3. she read the children a very interesting story. 4. they bought him a tape-recorder when he graduated from the institute. 5. they sang me some of the old songs.

1. A letter to him was written by them. 2. The house was sold by them to us  very cheaply. 3. A very interesting story was read by her to children. 4. A tape-recorder was bought by them to him when he graduated from the Institute 5. Some of the old songs were sang by them to me