1-This book will be read by them next term.
2-A new ring road round the city is being built by them.
3-The room is being cleaned by somebody at the moment.
4-All fights were cancelled by them because of fog.
5-I didn't realize that our conversation was being recorded by someone.
6-The date of the meeting has been changed by them.
7-Dan told me that he had been attacked by somebody in the street.