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Pollution is a “dirty” word. To pollute means to contaminate topsoil or something by introducing impurities which make (51) unfit or unclean to use. Pollution comes in many forms. We see it, smell it, (52) it, drink it, and stumble through it. We literally lived in and breathe pollution, and (53) surprisingly, it is beginning to (54) our health, our happiness, and our civilization.
Once we thought of pollution (55) meaning simply the smog—the choking, stinging, dirty (56) that hovers over cities. But air pollution, while it is (57) the most dangerous, is only one type of contamination among several (58) attack the most basic life functions.
Through the uncontrolled use of insecticides, man has polluted the land, (59) the wildlife. By (60) sewage and chemicals into rivers and lakes, we have contaminated our (61) water. We are polluting the oceans, too, killing the fish and (62) depriving ourselves (63) an invaluable food supply.
Part of the problem is our exploding (64). More and more people are producing more wastes. But this problem is intensified by our “throw—away” technology. Each year Americans (65) of 7 million autos, 20 million tons of waste paper, 25 million pounds of toothpaste tubes and 48 million cans. We throw away gum wrappers, newspapers, and paper plates. It is no longer wise to reuse anything, Today almost everything is disposable.

问题1选项
A.it
B.them
C.people
D.some
问题2选项
A.master
B.taste
C.touch
D.get
问题3选项
A.therefore
B.quite
C.yet
D.not
问题4选项
A.curse
B.threaten
C.cut
D.connect
问题5选项
A.as
B.over
C.for
D.to
问题6选项
A.atmosphere
B.air
C.surrounding
D.rain
问题7选项
A.not
B.yet
C.still
D.far
问题8选项
A.which
B.what
C.why
D.where
问题9选项
A.kills
B.killed
C.kill
D.killing
问题10选项
A.dump
B.dumping
C.cast
D.casting
问题11选项
A.pollutant
B.used
C.drinking
D.dirty
问题12选项
A.so
B.thereby
C.because
D.for
问题13选项
A.over
B.off
C.from
D.of
问题14选项
A.people
B.person
C.population
D.human
问题15选项
A.dispose
B.dispatch
C.disperse
D.discover
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