1. Someone has told him to report for duty at 6.00pm.
→ He has been told to report for duty at 6.00 pm.
2. Does John return the book he borrowed yesterday?
→ Is the book John borrowed yesterday returned by him?
3.What language do they speak in Japan?
→ What languages are spoken in Japan?
4.They haven't done anything about it
→ Nothing has been done about it.
5. It is time someone told him what is wrong
→ It's time he's told what's wrong.
6.Ann gave the boy a ticket and led him to the theatre.
→ The boy was given a ticket by Ann, and then he was led into the theatre by her.
7. Someone broke into his house and stole a lot of things.
→ His house was broken into by someone and a lot of things were stolen.
8. Someone switched on the light and opened the door.
→ The light was switched on and the door was opened.
9. Why did no one inform me of the change of plan?
→ Why wasn't I informed of the change of plan?
10. They will say nothing more about the matter if someone returns the stolen gun.
→ Nothing will be said unless someone returns the stolen gun.
11. You shouldn't leave the documents on the desk. You should lock them up.
→ The documents shouldn't be left on the desk. They should be locked up.
12.No one can do anything unless someone gives us more information.
→ Unless someone gives us more information, nothing can be done.
13. Who is going to meet Ann at the airport?
→ Who is going to be met at the airport by Ann?