The Ice Age
Twenty thousand years ago, the earth was held in control by relentlessly (不宽容地) probing fingers of ice that drew power from frigid strongholds in the north and crept southwestward to bury forests, fields, and mountains. Landscapes that were violated by the slowly moving glaciers(冰川)would carry the scars of this advance far into the future. Temperatures dropped deeply, and land surfaces in many parts of the world were depressed by the unrelenting weight of the thrusting ice. At the same time, so much was drawn from the oceans to form these huge glaciers that sea levels around the world fell by three hundred and fifty feet, and large areas of the continental shelf became dry land.
This period of the Earth’s history had come to be called the Ice Age. In all, about eleven million square miles of land were covered with ice. The Ice Age terminated about fourteen thousand years ago when the ice sheets began to retreat. It took about seven thousan
A. Right
B. Wrong
C. Not mentioned
In the past twenty years, there has been an increasing tendency for workers to move from one country to another. (51) some newly independent countries have understandably restricted most jobs to local people, others have attracted and welcomed migrant workers. This is particularly the case in the Middle East, (52) increased oil incomes have enabled many countries to (53) outsiders to improve local facilities. (54) the Middle East has attracted oil-workers from the USA and Europe. It has brought in construction workers and technicians from many countries, (55) South Korea and Japan.
In view of the difficult living and working conditions in the Middle East, it is not (56) that the pay is high to attract suitable workers. Many engineers and technicians can earn at least (57) money in the Middle East as they can in their own country, and this i
A. in
B. about
C. for
D. to
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