Rewrite sentenses in the passive. Omit the agent where necessary.
1.This castle/ruin/200 years ago.
2.Alltheconcerttickets/already/sell.
3.The exhibits in the museum/must not/touch.
4.People believe that all types of public transport/power/by natural gas in the future.
5. Anewstadium/build/in the centre of thr city now.