1. Choose the correct words to complete the sentences.
1. They use aluminium / iron to make aeroplanes because it is light and strong.
2. The floors in their house are made of paper / wood that came from older buildings.
3. They live in a 300-years-old house made of stone / plastic.
4. Most lenses in glasses are made of plastic / glass nowadays because it is less likely to break.
5. I prefer shoes made of cardboard / leather because they are more comfortable.
6. Copper / Rubber is used in many electrical appliances because it carries electricity very well/
7. We put all of our things in cement / cardboard boxes before we moved to our new house.
8. People have always considered gold / ceramic valuable, and it was used as money for centuries.
9. The stones on the terrace are held together with nylon / cement.
10. Before rubber / iron tyres became common, wheels were covered in metal.
11. Steel / Aluminium is used to construct tall buildings because it is so strong.