John had been away from his home city for ten years.When

John had been away from his home city for ten years.When he came back to Mainfield,he saw many changes. Say what John saw using passive structures

1)they had built a new hospital
2)they had rebuilt the old library
3)they had turned the city centre into a real shopping area
4)they had opened a new fire station
5)they had changed the names of some streets
6)they had closed the city exhibition hall