2 Complete the sentences with the correct materials.
1 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_________