1) These books _____________ . a) are made of stone b) is made of paper c) are made of paper d) is made of stone 2) The bottle __________________. a) are made of wood b) is made of glass c) are made of glass d) is made of wood 3) The roads __________________________. a) is made of concrete b) is made of metal c) are made of concrete d) are made of metal 4) The pencils ________________. a) is made of brick b) are made of wood c) are made of brick d) is made of wood

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