Question

Из активного залога сделать пассивный1. 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.

Answer 1

1 these impurities must be separated from the metal.

2 the liquid alloy couldn`t be distinguised from a single one-substance liquid.

3 iron will be (или will have to be) separeted from sulphur with a magnet.

4 metals may be used in the main parts of structures or machine tools.

5 metals had to be casted into varied shapes.