2. Complete the sentences with the correct materials.

1   Shoes are often made of l______________________

2   Expensive rings are often made of g_________________

3   Car tyres are made of r_________________

4   Cups and plates are often c_________________ but sometimes they are made of c_________________

5   Books are made of p_________________

6   Pavements are often made of c_________________

7   Gates and fences are sometimes made of i_________________

8   Tents and backpacks are usually made of n_________________

9   In the past, coins were often made of c_________________

4. Match the words below with the diagrams.

circular      curved      rectangular      spherical

square      straight      triangular