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、they
B、/
C、that
D、who

答案D

解析 这个句子的主语是the Babylonians,谓语是后面的invented laws...。可见,逗号后面的成分要做补充说明用。根据已有的信息,我们可以推出这里who是正确的,它同后面的部分组成一个非限制性的定语从句,修饰主语。注意,that虽然也可以引导定语从句,但它不能引导非限制性定语从句。
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