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Question

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

Светлана Долгова · Accepted Answer

2) The library was rebuilt by them. 
3) The city center was turned by them into a real shopping area. 
4)A new fire station was opened by them. 
5) The names of some streets were changed by them. 
6) The city exhibition hall was closed by them.