Из активного залога сделать пассивный 1. We must separate these impurities from the...

Question

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.

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.