Water From the beginning, water has furnished man with a source of food and a highway to travel upon. The first civilizations ar

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问题 Water
From the beginning, water has furnished man with a source of food and a highway to travel upon. The first civilizations arose(51)water was a dominant element in the environment, a challenge(52)man’s ingenuity. The Egyptians invented the 365-day calendar in response to the Nile’s annual flooding. The Babylonians,(53)were among the most famous law-makers in ancient times, invented laws(54)water usage. Water inspired the Chinese to build a 1,000-(55)canal, a complex system which, after nearly 2,500 years, remains still practically(56)and still commands the astonishment of engineers. But(57)never found complete solutions to their water problems. The Yellow River is also known as "China’s Sorrow"; it is so unpredictable and dangerous(58)in a single flood it has caused a million(59). Floods slowed the great(60)of the Indus River Valley, and inadequate drainage ruined(61)of its land. Today water dominates man(62)it always has done. Its presence continues to(63)the location of his homes and cities; its violent variability can(64)man or his herds or his crops; its routes links him(65)his fellows; its immense value may add to already dangerous political conflicts. There are many examples of this in our own time.

选项 A、that
B、/
C、because
D、which

答案A

解析 前文有so,这里应该填入that,that引导的小句表示一种结果。又如:The weather was so bad that the children stayed indoors the whole day.
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