1) A very hard building material made by mixing together cement, sand, small stones and water is a) Brick b) Concrete c) Iron d) Stone 2) Brick is the variety of a) artificial stone b) natural stone  3) Reinforced concrete is a combination of a) concrete and mortar b) concrete and stone c) concrete and iron 4) What material is it? a) stone b) reinforced concrete c) mortar 5) Mortar is also a/an ______ material. a) artificial b) natural 6) What material is it? a) concrete b) reinforced concrete c) mortar 7) The most commonly used _____________ is oak, ash, pine, fir, cypress, walnut or redwood a) timber b) stone c) mortar d) reinforced concrete 8) In a mortar, the binding material (связующий материал) is a) cement b) sand c) cinder

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