2. 外语
  3. From the very beginning, water has furnished man with a source of food and a highway to travel. The first civilizations arose 【2

From the very beginning, water has furnished man with a source of food and a highway to travel. The first civilizations arose 【2

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问题      From the very beginning, water has furnished man with a source of food and a highway to travel. The first civilizations arose 【21】______  water was a dominant element in the environments, a challenge 【22】______  man’s ingenuity. The Egyptians invented the 3655-day calendar  (23   the Nile’s annual flooding. The Babylonians, 【24】______  were among the most famous law-makers in ancient times, invented laws 【25】______  water usage. Water inspired the Chinese to build a 1000 【26】______  canal, a complex system 【27】______  , after 2500 years, remains practically 【28】______  and still commands the astonishment of engineers. But 【29】______  never found complete solutions 【30】______  their water problem. The Yellow River is also known 【31】______  "China’s Sorrow". It is so unpredictable and dangerous 【32】______  in a single flood it has caused a million 【33】______ . Floods slowed the great 【34】______  of the Indus River Valleys, and innumerable damage mined 【35】______  of its land. Today, water dominates man 【36】______  it always has done. Its presence continues to 【37】______  the location of his homes and cities; its violent variability can 【38】______  man or his herds or his crops; its routes links him 【39】______  his fellows; its immense value may 【40】______  to already dangerous political conflicts. There are many examples of this in our own time.
【40】
选项 A、increase
B、add
C、solve
D、intensify
答案B
解析 根据句意并结合四个选项分析，只有add符合题意。add to意为“增添，扩大”。例如：This adds considerably to our difficulties．这一点在很大程度上增加了我们的困难。
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