Fill in the Blanks writing activity unit 8Online version Fill in the blanks with the correct material by Armando Jacobo 1 Glass rubber metal cardboard plastic 1 - Factories use to make cans and also cars . One of the strongest material that we know . 2 - can be melted down and reused . It is used to make bottles and Windows . 3 - Supermarkets , malls , stores etc . Use boxes made of so customers can carry their products there . 4 - People that work on soil wear boots made of , so they can have a better protection on their feet 5 - It is better to have cups and dishes made of at home to avoid accident s