18. Not only do hydroelectric power systems provide people with irrigation and drinking water, but they also provide importantly sources of electrical power.

19. The Federal Communications Commission supervises the suitable and quality of radio.

20. All cars, alike most trains and a few propeller planes, depend on combustion inside a piston cylinder.

21. The expansion of adult education centers had resulted partially from the service-based economy, which encouraging employees to update their skills for the changing job market.

22. The most significant evolutionary characteristic of the primates are the development of the opposable thumb.

23. Ludwig Beethoven was often indifferent to the titles of his composed and was generally oblivious to the names given them years after their completion.

24. Benny Goodman's orchestra, playing his original compositions and arrangements, achieving a fine distinction among his peers and contributed numerous innovations to modern big band jazz.

25. Mosquitoes are almost completey deaf, although its tiny ears can distinguish noise from silence.

26. Weed is a horticultural term referring toward unpleasant, unwanted, or intolerable plant growth.

27. susan B. Anthony, the first woman to vote in the United Sates, founded the American Women't Suffrage Movement, an institution that have always had a woment's rights agenda.

28. Criminal assault, committed against a member of the public, may consist of harassing behavior, threatening, or physical harm to others.

29. The realist movement in art was a reaction against abstract methods of portray reality.

30. During the 1950's skilled computer programmers scrce were in what is now Silicon Valley.

31. If a atom gains any electrons, it becomes negatively charged and can combine with other atoms.

32. The Parks and Recreation Department conduct extensive research on a great many aspects of the wilderness.

33. The analgesic most commonly administeed in medicine is aspirin, who produces reduction of pain over a general area.

34. Certain types of pumps work properly only in environmens with controlled precisely pressures.

35. Whales, while not as curious than the dolphins, show more persistence and use of communication in facing a problem.

36. The belief in goblins have existed from the earliest times, and the leends of many different peoples includes tales of goblins and their relationship to humans.

37. Electronic music enables artists to experiment with many sounds effects.

38. Denver, Colorado's capital and largest city, is industrial and baning center.

39. A hamster's sharp teeth can chew through wood, plastic, or soft metallic such as aluminum.

40. Anthropological studies have concluded that deeply hold belief and principles