Запишите и переведите предложения, обращая внимание на разные значения словаit.1.It is

Запишите и переведите предложения, обращая внимание на разные значения словаit.
1.It is the countrys natural wealth that determines the structure of its national economy.
2.It was proved that wastes from industrial enterprises have a dangerous effect on the environment.
3.When the temperature had been measured it was written down in the
table.