Дополните диалог:
Julia: Is this a workshop?
Instructor: Yes, 1_______. It is a workshop and there are many tools for your practice here. They are made of different engineering materials.
Paul: 2_______?
Instructor: They are called plastic, glass, wood, rubber and metal.
Michael: 3_______ steel, iron and copper are widely used for making tools.
Instructor: That is right. These metals 4_______ making bolts, screws, pipes, rods, nuts, wires, etc.
you are quite right
What are these materials called
I think
are widely used for