From the very beginning, water has
furnished man with a source of food and a highway to travel. The first
civilizations arose {{U}} (76) {{/U}} water was the dominant element in
the environment, a challenge {{U}} (77) {{/U}} man’s ingenuity. The
Egyptians invented the 365-day calendar {{U}} (78) {{/U}} the Nile’s
annual flooding. The Babylonians {{U}} (79) {{/U}} were among the most
famous law-makers in ancient times, invented laws {{U}} (80) {{/U}} water
usage. Water inspired the Chinese to build a 1,000 miles’ canal, a complex
system {{U}} (81) {{/U}}, after 2,500 years, remains particularly in use
and still commands the astonishment of engineers. But the ancients never found
complete A. that B. which C. because D. as 我来回答: 提交
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