Определите время и залог сказуемого, 1) The first railway bridge was made of timber. 2) At present all-metal eight wheel cars are being built. 3) Every year a lot of international and specialized exhibitions and fairs are held ...

Определите время и залог сказуемого, 1) The first railway bridge was made of timber. 2) At present all-metal eight wheel cars are being built. 3) Every year a lot of international and specialized exhibitions and fairs are held in different countries. 4) Iron and steel are produced from iron ore.