1. Wind motion can be observed in the mesosphere by _____ the trails of meteors passing through it.

2. Thomas Edison’s first patented invention was a device_____ in Congress.

3. Clara Bow, a popular actress in the 1920’s, retired _____ she was unable to make the transition from silent films to sound films

4. Built in 1882, the Kinzua Viaduct in Mckean County, Pennsylvania, is open only to those visitors _____ are able to walk its 2,058 – foot length.

5. A bridge must be strong enough to support its own weight _____ the weight of the people and vehicles that use it.

6. The swallows of Capistrano are famous _____ to the same nests in California each spring.

7. In the fourteenth century, _____ that glass coated with silver nitrate would turn yellow when fired in an oven.

8. _____ recurring fear is out of proportion to any real danger, it is called a phobia.

9. Many modern photographers attempt to manipulate elements of photography other _____ in their photographs

10. For any adhesive to make a really strong bond, _____ to be glued must be absolutely clean and free from moisture or grease.

11. Although still underwater, Loihi Seamount, the newest Hawaiian island, _____ closer to the surface by frequent volcanic eruptions that add layers of lava to the island.

12. _____ unstable and explodes as a supernova is not known.

13. Not until linoleum was invented in 1860 _____ hard – wearing, easy – to – clean flooring.

15. Oceans continually lose by evaporation much of the river water _____.

15. Oceans continually lose by evaporation much of the river water _____.

16. 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.

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

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

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

20. 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.

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

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

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

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

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

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

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

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

29. 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.

30. The central purpose of management is for making every action or decision help achieve a carefully chosen goal.

31. As a poetry Nikki Giovanni makes effective use of jazz and blues rhythms.

32. Unlike wood, paper, and fabric, which tendency to disintegrate after being buried for many years, ceramics and glassware although easily broken, survive well in the ground.

33. Margaret Mead achieved world famous through her studies of child – rearing, personality, and culture.

34. The discovery of the antibiotic penicillin in 1928 has not produced antibiotics useful for the treatment of infectious diseases until 1940.

35. In the United State, the Cabinet consist of a group of advisers, each of whom is chosen by the President to head an executive department of the government.

36. Colleges in the newly formed United States, in recovering from the adverse effects of the American Revolution, inaugurated a broad curriculum in response of social demands

37. Humus is formed during soil microorganisms decompose animal and plant material into elements usable by plants.

38. Ozone is an unstable faintly bluish gas that is the most chemical active form of oxygen.

39. The development of professional sports in the United States dates back to nineteenth century.

40. Long before his death, John Dewey saw his philosophy have a profound influences on education and thought in the United States and elsewhere.