题目
In ancient times, man settled near rivers or on river 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 and minerals from the mountains and deposit them on the plains building up rich river deltas for raising plants and crops. Fresh water life in rivers or in lakes fed by them provide man with food.
In a small way rivers help to keep man in good health and provide for his amusements. Various forms of water sports keep man strong and healthy.
Rivers have run on this earth long before man. Man's future ability to live is uncertain, but rivers will flow on forever.
Rivers have been important to man ______.
A.since the last century
B.for a very long time
C.since a few hundred years ago
D.since a few years ago
第1题
A、on the horizon
B、 from the beginning to end
C、 in the end
D、 at the beginning of
第3题
A. objective to
B. object to
C. aim to
D. aim at
第4题
A.with
B.by
C.t o
D.from
第5题
第6题
In fact ,practically every royal head of state from the beginning of civilization to the French Revolution seemed to want to own animals of great beauty.
第7题
Jack________ from home for two days now, and I am beginning to worry about his safety.
A.has been missing
B.has been missed
C.had been missing
D.was missed
第8题
A.social
B.economic
C.political
D.religious
第9题
from the very beginning of next semester.
A) takes effect B) takes part C) takes place D) takes turns
第10题
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