1. A chair was offered me by him.
I was offered a chair by him.
2. All the money was given him by us.
He was given all the money by us.
3. A new magazine has just been shown me.
I have just been shown a new magazine.
4. A new toy was promised the boy by mother.
The boy was promised a new toy by mother.
5. The news has been told me by nobody.
I have been told the news by nobody.
6. The invitation was sent you last week.
You were sent the invitation last week.
7. Some books on this problem have been promised me.
I have been promised some books on this problem.
