1. While the twentieth century, the field of dentistry has developed braches that specialize in the treatment of individual dental problems

2. Certain zoologists regard crows and ravens are the most intelligent of birds .

3. Many television newscasters make the public an eyewitness to the news by means of on-the-spot, alive reports.

4. The Millicent Rogers Museum houses five thousands pieces of Hispanic and American India jewelry, textiles, and other objects documenting the vibrancy of these cultures .

5. The development of photographic techniques and equipment provided an important aid to industry, medical , and research.

6. Dams are used to control flooding, provide water for irrigation , and generating electricity for the surrounding area .

7. Although fluorine tests and x-ray analyses, archaeologists can prove the validity of artifacts.

8. Mount Edith Cavell, a peak in the Canadian Rockies, is named after a famous nurses .

9. North America has eight time zone , ranging from Newfoundland on the East Coast to Alaska on the West Coast.

10. The novels of Pearl S. Buck show a keen understanding of China and Chinese people , knowledge which learned by living there for many years .

11. In proportion to its size, the hungriest animal is the shrew, which must consume several times their own weight every day.

12. Some psychologists believe that those who are encouraged to be independent, responsible ,and competent in childhood are likely more than others to become motivated to achieve

13. In 1991 Antonia Novello, the United States Surgeon General launched several programs to address particular problem that young people have.

14. The evolution of fishes is a history of constant adaptation to new possibilities, and a refined of these adaptations.

15. When contented, and occasionally when hunger , cats frequently make a purring sound .

16. The fragrant leaves of the laurel plant to sell commercially as bay leaves and are used for seasoning foods .

17. Most countries depend to few extent on cereal imports to augment their own crops .

18. Many poets enhance their work by creating a contrast among realism and symbolism in a given poem.

19. Geologists find it useful to identification fossils in a rock sample because certain assemblages of species are characteristic of specific geologic time periods.

20. The homes created by the legendary architect Frank Lloyd Wright are still viewed as uniquely , innovative, and valuable.

21. Because of the availability of trucks and easy access to modern highways, the locate of farms has become relatively unimportant with respect to their distance from markets.

22. The aardvark is a mammal that burrows into the ground to catches ants and termites.

23. In 1977 Kathleen Battle was hired by the New York Metropolitan Opera, Where her became the star soprano.

24. The oxygen in the air we breathe has no tasted , smell, or color .

25. Because of it consists only of a relatively short strand of DNA protected by a shell of protein, a virus cannot eat or reproduce by itself .