Из активного залога сделать пассивный 1. We must separate these impurities from the metal. 2. We could not distinguish the liquid alloy from a single one-substance liquid. 3. They will have to separate iron from sulphur with a magnet. 4. We may use metals in the main parts of structures or machine tools. 5. They had to cast metals into varied shapes.
These impurities must be separated from the metal.The liquid alloy could not be distinguished from a single one-substance liquid.Iron will have to be separated from sulphur with a magnet.Metals may be used in the main parts of structures or machine tools.Metals had to be cast into varied shapes.