1. A good exercise program helps teach people to avoid the habits that might shorten the lives.

2. Concentration is one of the most important elements in dangerous driving.

3.The most easiest process for mining gold is panning, which involves using a circular dish with a small pocket at the bottom.

4.?While techonology makes this possible for four or even six billion of us to exist, it also eliminates our job opportunities.

5.The West Lake is so beautiful place that it attracts thousands of tourists every year.

6.?Researchers at the University of Colorado are investigating a series of indicators that could help themselves to predict earthquakes.

7.As inevitably as human culture has changed with the passing of time, so does the environment.

8.Those students, who have passed the examination, they needn't take the course this term.

9.Zoological parks in many cities export birds from many lands and are a source of recreation for millions of people each year.

10.An expert, together with some assistants, have been sent to help us with the project.

11.In the eighteenth century farmers were quite self-sufficient. The farm family grew and made almost nothing it needed.

12.Salt Lake City, Utah's capital and largest city, is industrial and banking center.

13.The United States Constitution requires that the President be a natural-born citizen, thirty-five years of age or be older, who has lived in the United?States for a minimum of fourteen years.

14.Fungi are important in the process of decay, which returns ingredients to the soil, enhances soil fertility, and decompose animal debris.?

15.A common use with gold in the nineteenth century was as a standard for the value of money.

16.A hologram is a pattern usually made on film in that can?create a three—dimensional image of a scene.

17.The methods of spectrum analysis vary according to the wavelength region were studied.

18.Having resided in New Mexico for many years, painter Georgia O'Keefe employs such as Southwestern motifs as bleached bones, rolling hills, and desert blooms.

19.A microphone enables a soft tone to be amplified, thus making it possible the gentle renditions of romantic love songs in a large hall.?

20.The Appalachian Trail, extending approximately 2,020 miles from Maine to Georgia, is the longer continuous marked footpath in the world.

21.Not woman held a presidential cabinet position in the United States until 1933, when Frances Perkins became secretary of labor.?

22.Too much electric current may flow into a circuit as a result either of a fault in?the circuit and of an outside event such as lightning.?

23.Barges which carrier most of the heavy freight on rivers and canals are usually propelled by towing.

24.It is more difficult to write simply, directly and effective than to employ flowery but vague expressions that only obscure one's meaning.

25.Different species of octopuses may measure anywhere from two inches to over thirty feet in long.

26.The begins of the modern chemistry laboratory go back to the workrooms of medieval alchemists.

27.George Washington Carver found hundred of uses for the peanut, the sweet potato, and the soybean and thus stimulated the cultivation of these crops.

28.Conservative philosophers argue that the very structure of society is threatening by civil disobedience, while humanists stress the primacy of the individual conscience.

29.A rocket burns propellant rapidly and most rockets carry a supply that last just a few seconds.

30.Industrial buyers are responsible for supplying the goods and services that an organization required for its operations.

31. Although it is any longer the big business that it was in the forties, radio continues to be a medium of essential communication, especially at the local level.

32. The expansion of adult training programs has resulted partially from the feminist movement, which encouraging women to improve their skills for the job market.

33. Elizabeth Blackwell, the first woman medical doctor in the United States, founded the New York Infirmary, an institution that have always had a completely female medical staff.

34. The boiled point of any liquid is determined by the pressure of the surrounding gases.

35. Meadowlarks are about the same size than robins, but they have heavier bodies, shorter tails, and longer bills.

36. Alike light waves, microwaves may be reflected and concentrated.

37. When overall exports exceed imports, a country said to have a trade surplus.

38. Anthropologists agree that our primitive ancestors who inhabited the tropics probably have natural protection against the sun.

39. A liquid is similar to a gas because has molecules are not fixed to each other in any specific way.

40. Providence, Rhode Island, is a busy manufacturing city and seaport, as well the state capital.

41. Muscular motion is caused by the stimulate of specific nerve cells in the brain and spinal cord.

42. When does a neutron from one atom collides with the nucleus of another atom, a chain reaction can occur.

43. The young of most bird species are totally dependence on parental care after hatching.

44. Jackie Mclean's recordings have shown that he is one of the few jazz musicians who style of playing has kept pace with the evolution of modern jazz.

45. How Native Americans developed corn is a puzzling, for no wild corn has ever been discovered.

46. A principle of manager is to ensure that every action or decision achieves carefully planned goal.

47. Classicism as a doctrine seeks what is universally truth and good.

48. Luminescence refers to the emission of light by means another than heat.

49. The situation comedy has proved to a remarkably durable commercial television format.

50. Almanacs in simple form have been known from the invention of writing.

51.It has not been determined how years sea turtles can live in their environment, but they will reach a very old age if left undisturbed by humans.

52.A patent gives inventors exclusive rights to their inventions for a fix period of time.

53. A statue, a monumental, a building, or a park may be dedicated to commemorate a distinguished individual.

54. Moles are almost completely blind, although its tiny eyes can distinguish light from dark.

55. The Cubist movement in art was a reaction against traditional methods of portray reality.

56. Acrylic paint enables artists to experiment with many colors effects.

57. A rat's sharp teeth can gnaw through wood, plaster, or soft metallic such as lead.

58.Brooklyn, New York, had a population of about 23,000 when it becomes a city in 1834.

59.Ensuring an adequate water supply have been a concern ever since people began to live in towns and cities.

60. Data received from two spacecraft indicate that there is many evidence that huge thunder storms are now occurring around the equator of the planet Saturn.

61.Every individual cell, whether its exists as an independent microorganism or is part of a complex creature, has its own life cycle.

62. The need for more food discourages development of better technology which naturally keeps more people alive.

63. Even before the human organism developed into their present stage of Homo sapiens, the beginnings of culture were already evident.

64. The old man is very pleased to be told that his daughters and son-in-laws are going to see him tomorrow.

65. Salmon spend most of their adult lives in salt water, despite they return to their freshwater birthplaces to spawn and die.

66. Perspiration, the body's built-in cooling mechanism occurs as a natural reaction to nervousness, intense heat or vigorously exercise.

67. Because of the rising cost of fuel, scientists are building automobile engines who will conserve gasoline but still run smoothly.

68. One of the wildest and most inaccessible parts of the United States are the Everglades where wildlife is abundant and largely protected.

69.Swans, noted for graceful movements in the water, have been the subject of many poetry, fairy tales, legends, and musical compositions.

70. At night the desert floor radiates heat back into the atmosphere and the temperature may be drop to near freezing.

71. A thousand miles no longer mean much to us today for modern jets can easily get us over this long distance within a matter of a few hours.

72. To stay warm in cold weather, cold-blooded animals must expose itself to a source of warmth such as direct sunlight.

73. Christopher Plummer is a Canadian actor who has starred in stage, television, and film productions on both sides the Atlantic Ocean.

74. The private satellite industry sprang up in the mid-1960's to relay not only television broadcasts but too phone calls and computer data.

75. During the Colonial days, the Iroquois had an agricultural economy basing mainly on corn with supplementary crops of pumpkins, beans, and tobacco.

76. Best known for his research in statistical mechanics and meson physics, Chen Ning Yang shared the Nobel Prize in 1957 to another physicist from the United States,Tsung-dao Lee.

77.Scientists finding out that the universe is even larger and more complex than anyone has ever imagined.

78. The aging process is not entirely determined by heredity, but is influenced by different environmental and social circumstances as good.

79.Whichever they may differ widely in function, all cells have a surrounding membrane and an internal, water-rich substance called cytoplasm.

80.Booker T. Washington, an educational leader, worked throughout the lifetime to improve economic conditions for Black people in the United States.

81.We each has to hand in a paper on the topic of environment before the end of this term.

82. Antique auctions have become popular in the United States because a steadily increasing awareness of the investment value of antiques.

83.Our urge to classify different life forms and give us names seems to be as old as the human race.

84.By studying geometry, students can learn what to develop logical arguments through deductive reasoning.

85.“How does the human brain work?” remains one of the most profound questions confront modern science.

86.One out of every ten persons in the 1978 United States labor force was a teenager, compared by one out of fifteen in 1960.

87.Even many early leaders of the United States have provided names for towns, only?George Washington is remembered in the name of a state.

88. Applied research aims at some specific objective, such as the development of a new produce, process, or material.

89.The founding of the Boston Library in 1653 demonstrate the early North American colonists'?interest in books and libraries.

90. Membership in labor unions in the United States reached its peak of 17 millions members in 1960.

91. Varieties of yellow grapes that have tender skin, rich flavor and high sugar content are especially suited with making raisins.

92. Wildlife conservationists say the cover that foliage provides for animals is equal in importance to the food supplying.

93.For make adobe bricks, workers mix sand and clay or mud with water and small quantities of straw, grass, or a similar material.

94.Among almost seven hundred species of bamboo, some are fully grown at less than a foot high, while other can grow three feet in twenty four hours.

95.Recent studies have shown that air into a house often has higher concentrations of contaminants than heavily polluted air outside.

96.Langston Hughes, a prolific writer of the 1920's was concerned with the depicting the experience of urban Black people in the United States.

97.Human being have thirty-three or thirty-four vertebrae, but a snake may have as many as three hundred.

98. Over the past two decades, the popularity of the bicycle as a mean of transportation and recreation has increased tremendously in the United States.

99. He was only one of the candidates who was going to take the oral defense.

100. For convenience it is common to speak of plants as “herbs,” “shrubs,” and “trees,” but it is really no sharp distinctions among them.