The steam engine is usually thought of as a relative modern invention, but the Greeks built a kind of steam engine in ancient times

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• Ocean currents that help transfer heat from the equator to the poles, thereby creating a more balanced global environment.

• Migration of animals be initiated by physiological stimuli such as reproductive changes, external pressures such as weather changes, or a combination of either types of changes.

• Carrie Chapman Call organized the League of Women Votes after successfully campaign for the constitutional amendment that gave women the right to vote.

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• The Humber River and its valley form a major salmon-fishing, lumbering, hunting , and farmer region in western Newfoundland, Canada.

• Choose the correct answer to complete the sentence.  "In the polluted environment, _______ diseases can be passed easily from one person to another"

• If the world's tropical forests continue to disappear at their present rate, many animal species ____________ extinct. 

• However types of raw materials are used in making paper, the process is essentially the same.

• Many roads and railroads were built in the 1880s because of the industrial cities needed a network to link them with sources of supply.

• A computer networks usually includes either selected employees of a particular business or or people who do not work together but have similar interests.

• Psychologists at the University of Kansas has studied the effects of the color of a room on people’s behaviors

• Long prized for its medicine value, ginseng these days has become the most common of energy-boosting drinks particularly for high- performance athletes.

• Before she moved to California, with its much milder climate, Betty found that her health improved considerably.

• One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

  If the doctors find in the remedy, a lot of people would be saved. 

• Everyday in summer, but especially at the weekends, all kinds of vehicles bring crowds of people to enjoy the various attraction.

• This ticket doesn't cost a lot, _    ?

• When scientists discovered how soap works, it became possible to do synthetic detergents out of Petroleum.

• The medical problems of parents and their children tend to be very similar to because of the hereditary nature of many diseases.

• Many automobile factories have found that human operators work more effective than automated ones in regard to flexible decision making

• The bold way in which Margaret Mead defined the terms “family” – based as much on choice as on biological relationship – is possibly the most enduring of her legacies.

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