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Paul: Look. There is a box of nuts and 1_______. They are made of steel.
Julia: And that wire is made of copper, isn’t it?
Michael: Yes, it is. What about this 2_______? Is it made of copper too?
Paul: No, it is not. It is made of 3_______ and steel. The handle is made of wood and the head is made of steel.
Julia: Michael, give me that beaker, please.
Michael: Be careful, Julia. Don’t drop it. It is made of 4_______. Put it here on this shelf.