Rambler's Top100

IV. Speaking Practice:
Ex.1. Answer the following comprehension questions:
1. Since what times has concrete been a high-tech material?
2. What should be added to make concrete less liable to shrink and more
3. What can concrete conduct?
4. What other unusual properties do scientists plan to use while making
5. What are ingredients of concrete?
6. What can be said about translucent concrete?
Ex.2. Recall the situations from the text illustrating the Active Vo-
Ex.3. Say everything you can about:
Ingredients of concrete;
Properties of concrete;
Transparent concrete.
Ex.4. Make up a dialogue between a scientist and a publisher of one of
Ex.5. Retell the story as if you were:
A scientific researcher;
A publisher;
A worker at one of the building companies.