[单项选择]From the information given in the passage, the author's main concern is that _________.


A. the environment well-being and our health are related
B. the environment and the results of our exercising is relevant
C. the ever changing living standards demand more from the environment
D. the balance of environment and economic development is vital for the society

[单项选择]From the information given in the passage it may be concluded that Calen ______.


A. taught and practiced medicine in Greece
B. shocked the medical men of his time with his research
C. made some incorrect statements about the human body
D. refused to let Roman religious beliefs interfere with his research

[单项选择]From the information given in the passage, most minerals would melt fastest _____________.


A. at 4,000°F, 5,000 feet below sea level
B. in the absence of oxygen
C. at 4,000°F, 5,000 feet above sea level
D. at the exact center of the earth at 4,000°F

[单项选择]A serious environmental problem resulting from automobiles is _________.


A. tragic loss of life
B. traffic jams
C. air pollution
D. mental stress

[单项选择]From the information given we understand that students ______.
A. may only borrow books from their local library
B. must have special tickets to borrow books from another library
C. may lend their tickets to students in other libraries
D. may use their tickets to borrow books from other libraries

[单项选择]Based on the information from the passage, which of the following people do you think can benefit most from public relations services


A. Stockholders.
B. Presidents.
C. Artists.
D. Scholars.

[单项选择]

Passage Five
From the beginning rivers have played an important part in the life of man. Man of the earliest times used the rivers as a means of travel. Today rivers still serve as a great waterway for the transport and people.
In ancient times, man settled near rivers or on fiver banks and built up large empires.
Water is Nature’s most precious gift to man. Man needs water to irrigate his crops, to cook and to wash. In nations all over the world rivers mean life and wealth. They feed and clothe the nations around them.
Water is also a source of energy and power. Man constructs huge dams across the river to control the water for irrigation and get the energy needed to drive generators. The electrical power is then directed to homes, cities, factories and television stations.
Man uses water each day. His main source of water comes from reservoirs, which in turn get their water from the rivers.
Rivers also bring down soil
A. since the last century
B. for a very long time
C. since a few hundred years ago
D. since a few years ago