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.
【23】

选项 A、in regard to
B、in response to
C、incase
D、in spite of

答案B

解析 in regard to意为“关于,就…而论”;in response to意为“作为对…的答复/反应”;in case意为“假使,以防万一”;in spite of意为“不管,尽管”。根据句意可知,in response to符合题意。
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