从方框中所给的选项中选出能填入空白处的最佳选项.补全短文.其中有一项为多余选项. March 20th is World Water Day every year. According to a report from the United Nations, more than half of the world's major rivers have serious water lo 题目和参考答案——青夏教育精英家教网—

从方框中所给的选项中选出能填入空白处的最佳选项，补全短文，其中有一项为多余选项。

      March 20th is World Water Day every year. According to a report from the United Nations, more than
half of the world's major rivers have serious water loss and are polluted.
      The Yellow River, the world's fifth longest river, watered some of the oldest farms on earth. But now it
has a serious problem. 1_______ In most of the past 35 years, it didn't reach the sea.
      The Nile in Egypt, running 6, 650 km, is the longest river in the world. 2_______ Now it is down to 2
billion m' or so. Australia's Murray River reaches the sea only every other year. One fifth of America's Rio
Grande has no water, either.
     3_______
     Mostly it's damming (筑坝) and global warming that make rivers dry.
     4_______ Now about 45, 000 of them lie across the world's rivers. They hold back around 15% of the
world's fresh water from running to the sea.
     Global warming is making things worse. Warmer weather takes water away. The glacier (冰川) are
becoming smaller. 5_______ Global warming has had certain effects on water sources (源头). Droughts
(干旱) happening around the world make people pay more attention to this fact.

A. Dams hold water to irrigate (灌溉) fields and make power.
B. The source of the Yellow River is drying up because of it.
C. It used to carry 32 billion m' of water a year.
D. How does it happen?
E. Factories pour waste water into rivers directly.
F. Its source on Qinghai-Tibet Plateau is drying up.

1.________2.________3.________4.________5.________

1-5 FCDAB

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