VI. B. A) Insert articles where necessary

1. Binding materials have the ability to harden passing from ... liquid state to a solid one. 2. From ... most widely used binding materials we know gypsum, stucco, plaster, lime, cement. 3. Plaster is applied as ... finish for walls. 4. Plaster forms ... hard surface. 5. According to ... character of its base plasters may be classed as lime plasters and gypsum plasters. 6. Stucco is applied to the exterior of buildings to form ... finishing coat. 7. By ... addition of coloured pigments many coloured cements can be produced.

b) Insert prepositions where necessary

1. Binding materials have the ability to harden passing ... a liquid state ... a solid one. 2. ... the most widely used binding materials we know gypsum, stucco, plaster, lime, cement. 3. According ... the character of its base plasters may be classed as lime plasters and gypsum plasters. 4. Plaster is applied ... a finish for walls and ceilings. 5. Gypsum is never used in situations exposed ... weather. 6. Plaster of Paris is used ... cast ornamental plaster work. 7. Stucco is applied ... the exterior of buildings to form a finishing coat. 8. Portland cement now ranks second only to steel ... a structural material. 9. ... the addition of coloured pigments many coloured cements can be produced.

c) Choose the right variant

1. Binding materials (have / has) the ability to harden. 2. Binding materials (pas / passing) from a liquid state to a solid one. 3. From the most widely (used / using) binding materials we know gypsum, stucco, plaster, lime, cement. 4. Plaster is (apply / applied) as a finish for walls and ceilings. 5. Plaster (form / forms) a hard surface. 6. According to the character of its base plasters (must / may) be classed as lime plasters and gypsum plasters. 7. Plaster of Paris (produce / produces) hard surfaces. 8. Architectural and sculptural ornaments (is / are) made of it.

VI. C. Answer the questions

1. What are binding materials? 2. What is plaster? 3. Where is plaster applied? 4. How may plasters be classed? 5. What is gypsum? 6. Where is Plaster of Paris used? 7. Where is stucco applied? 8. What are architectural and sculptural ornaments made of? 9. Where is Ordinary Portland cement used? 10. What are different types of cement? 11. Where is Low heat Portland cement used? 12. Is High alumina cement attacked by frost? 13. How can coloured cements be produced?

VI. D. Speak on binding materials using the text, the table and the following: As far as I know, it should be noted, in fact, to divide into

Table 1