Переделать предложения из действительного залога в страдательный. 2) a combination of electric networkshas transmitted electricity to distan parts of the country. 4) high voltage transmission lines have connected our power station into several networks. 5) electricity had provided manking the energy of the future. 6) we shall have taught to use that energy saving device by 3 o'clock.

1  Electricity is transmitted with a combination of electric networks to distant parts of the country.
2 Our powerful station is connected with High voltage transmission lines into several networks. 
3 Electricity had been provided manking the energy of the future.
4 we shall have been taught to use that energy saving device by 3 o'clock.