Question

The concept of obtaining fresh water from icebergs that are moved to populated areas and barren regions of the world was once treated as a joke more appropriate to cartoons than real life. 1,especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.

Glaciers (冰河) are a possible source of fresh water that has been overlooked until recently. Three quarters of the Earth's fresh water supply is still tied up in glacial ice,2 that it could maintain all the rivers of the world for 1 ,000 years. Floating on the oceans every year are 7 ,659 trillion metric tons of ice stored in 10 ,000 icebergs that break away from the polar ice caps,more than ninety percent of them from Antarctica.

Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice,3 ，rather,they are formed entirely on land,breaking off when glaciers spread over the sea. As they drift away from the polar region,icebergs sometimes move mysteriously in a direction opposite to the wind,4 Because they melt more slowly than smaller pieces of ice,icebergs have been known to drift as far north as 35degrees south of the equator in the Atlantic Ocean. To move them to parts of the world where they are needed would not be too difficult.

5,such as the prevention of rapid melting in warmer climates and the storing of fresh water in great volume. But even if the icebergs lost half of their volume in moving,the water they could provide would be far cheaper than that produced by removing salt from sea water.

   A. which is formed when the sea itself freezes

   B. Difficulties arise in other technical matters

   C. But now it is being considered quite seriously by many nations

   D. Icebergs are not too much influenced by the temperature.

   E. pulled by subsurface currents

   F. a reservoir (蓄水池) of untapped fresh water so large

   G. People often get fresh water by removing the salt from sea water.

 1.                  2.                  3.         4.          5.         

Answer 1

从冰山获得淡水并运送到人口密集地区和贫瘠地区曾一度被认为是一个笑话，但是现在它正在被许多国家视为可以操作的现实问题。

1. C考查上下文的衔接和逻辑关联。前文说这一概念曾是一个笑话，后文表明淡水供应跟不上人口增长，只得考虑其方法，前后明显是对比

和转折关系。

2. F这里是对前文"glacial ice"的注释和说明：冰河是如此巨大的未被开发的"蓄水池"，且下文还有that引起的结果状语从句："that it could maintain all the rivers of the world for   1.000 years."

3. A如上文是对冰川的注释，这里是非限制性定语从句，对"sea ice"作出注释和说明。

4. E冰川的移动，仿佛是被次表层洋流推动着。

5. B这里是对第一段的呼应和回归。第一段说的是现在人们在考虑开发冰川，这里说到开发时可能会有的问题及与利用海水相比的优势。