Everyone who has visited the city agrees that it is______with life.

A.vibrant

B.violent

C.energetic

D.full

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The number of USA citizens who are eligible to vote continues to increase.

A.encouraged

B.enforced

C.expected

D.entitled

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Although nobody was very enthusiastic about it, they decided to cancel the trip.

A.Provided

B.On condition that

C.See to it that

D.Seeing that

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Some pioneering work that began as an attempt to discover ways to increase production efficiency led to the founding of the human relations movement in industry and to the development of motivational skills and tools for managers.In 1927 researchers were involved in determining the optimum amount of lighting, temperature, and humidity (with lighting being considered the most important) for the assembly of electronic components at Western Electric.The researchers found that lighting had no consistent effect on production.In fact, production sometimes increased when lighting was reduced to the level of ordinary moonlight! The important part of this experiment began when two Harvard researchers, Elton Mayo and Fritz Roethlisberger, were brought in to investigate these unexpected results further.They found that workers were responding not to the level of lighting but to the fact that they were being observed by the experimenters.
This phenomenon came to be known as the Hawthorne effect since the experiments were conducted at the Western Electric Hawthorne Plant.This was the first documented and widely published evidence of the psychological effects on doing work, and it led to the first serious effort aimed at examining psychological and social factors in the workplace.Further experiments were continued for five years.Generally, the researchers concluded from their experiments that economic motivation (pay) was not the sole source of productivity and, in some cases, not even the most important source.Through interviews and test results, the researchers focused on the effects of work attitudes, supervision, and the peer group and other social forces, on productivity.
Their findings laid the groundwork for modem motivation theory, and the study of human factors on the job, which continues to this day in such common practices as selection and training, establishing favorable work conditions, counseling, and personnel operations.The contributions of this experiment shifted the focus of human motivation from economics to a multifaceted approach including psychological and social forces.

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Throughout history has 1 changed his physical environment in order to improve his 2 of life.With the tools of technology he has 3 many physical features of the earth.He has 4 woodlands and prairies into farms and made lakes and reservoirs 5 of rivers for irrigation purposes or hydroelectric 6 .Man has also modified the face of the earth by 7 marshes and cutting through mountains to 8 roads and railways.
However, man’s 9 to the physical environment have not always had beneficial results.Today, 10 of the air and water is an increasing danger to the health of the 11 .Each day thousands of tons of gases come out of the exhausts of motor vehicles.
12 from factories pollutes the air of industrialized areas and the surrounding 13 of the countryside.The pollution of water is equally harmful.The whole ecological 14 of the sea is being changed and 15 wastes have already made many rivers lifeless.
Now 16 protection is more pressing than ever before.As we know, massive destruction of the environment has brought about 17 effects and even poses a great 18 to man’s existence.Indifference to these problems will mean committing suicide.Therefore, effective 19 should be taken and laws passed to 20 the environment.Otherwise, man is certain to suffer from the serious consequences caused by this lack of care for his living surroundings.

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