题目内容
—I think vocabulary is important in language learning.
—Yes. You should find different ways you can think of words and expressions.
A. remember B. to remember C. remembering
B
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s.根据短文内容，从短文前方框内的选项中选出能填入空白处的最佳选项
| A. Dams hold water to irrigate (灌溉) fields and make power. B. The source (源头) of the Yellow River is drying up because of it. C. It used to carry 32 billion m³ of water a year. D. How does it happen? E. Its source on Qinghai-Tibet Plateau (青藏高原) is drying up. |
March 22nd is World Water Day every year. According to a report from the United Nations in 2006, 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 kms, is the longest river in the world. 2 Now it is down to 2 billion m³ 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 glaciers (冰川) are becoming smaller. 5 Global warming has had certain effects on water sources. Droughts (干旱) happening around the world make people pay more attention to this fact.