1. Diamond itself is the only material hard enough to cut and polishes diamonds.
2. The tornado uprooted all the power lines leading to the town so the inhabitants had to live in darkness until new ones.
3. Before the nineteenth century it was rarely to find organized systems of adult education.
4. This new model not only saves time but also energy by operating on two batteries instead of four.
5. When scientists discovered how soap works, it became possible to do synthetic detergents out of petroleum.
6. When Keith visited Alaska, he lived in a igloo in the winter months as well as in the spring.
7. The price of gold depends in several factors, including supply and demand in relation to the value of the dollar.
8. There are many ways to preserve fruit, for example freezing, canning and to dry.
9. We were taught that one's future is entirely in our own hands and neither a matter of family connections nor of fate and good luck.
10. Work is often measure in units called foot pounds.
11. Archaeological evidence reveals that Native Americans lived on the East Coast of the United States 13 centuries before.
12. Exercising well is as important to your health as sleep and eating correctly.
13. The mayor and the council, meeting at the city hall as usual, they did not discuss the proposed new sports complex as planned.
14. Linoleum is a trade name for the waterproof floors covering most often used in kitchens.
15. The planning committee told Julie that they had decided hers proposal would be adopted.
16. Because there were so few women in the early Western states, the freedom and rights of Western women were more extensive than Eastern ladies.
17. It has been found that the length of light or dark periods influence certain activities of flowering plants.
18. Unless one subscribes to a large metropolitan newspaper such as the "Wall Street Journal", or the "Washington Post", one will find very few news from abroad.
19. The masterpiece "A Christmas Carol" wrote by Charles Dickens in 1843.
20. Many of the characters portrayed by writer Joyce Carol Oates is mentally ill.