Question

根據(jù)短文內(nèi)容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。 
Obtaining Fresh Water from Icebergs
The idea of getting fresh water from icebergs that are moved to populated areas or places was once treated as a joke. Recently, scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.___ 小題1:___
Glaciers are a possible source of fresh water that has been overlooked until recently. __小題2:__It contains fresh water so much that it could sustain(維持) all the rivers of the world for 1,000 years. Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year.__ 小題3:__ However, 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. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator(赤道) in the Atlantic Ocean. __小題4:__ The difficulty exists such as its rapid melting in warmer climates. __小題5:__

A．Icebergs are not like sea ice, which is formed when the sea itself freezes.

B．Now it is being considered quite serious by many nations.

C．7,659 trillion metric tons of ice are floating on the sea every year.

D．But the water they could provide would be far cheaper than that produced.

E. To move them to dry parts of the world would not be too difficult.
F. It is not a dream to get water from icebergs.
G. Three-quarters of the Earth’s fresh water supply is still tied up in glacial ice.

Answer 1

小題1:B
小題2:G
小題3:A
小題4:E
小題5:D

試題分析：
小題1:根據(jù)Recently, scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.可知這里想說最近，科學家提醒人類淡水資源的供給的快速增長將會比用完食物的速度要快。故選B。
小題2:根據(jù)Glaciers are a possible source of fresh water that has been overlooked until recently. __72__It contains fresh water so much that it could sustain(維持) all the rivers of the world for 1,000 years.可知這里想說地球上四分之三的淡水資源依然靠冰川。故選G。
小題3:根據(jù)However, they are formed entirely on land, breaking off when glaciers spread over the sea.可知這里想說冰山不像海冰，它是在海水結(jié)冰時形成的。故選A。
小題4:根據(jù)As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator(赤道) in the Atlantic Ocean.可知這里想說把它們移到世界干旱的地方，不會太困難。故選E。
小題5:根據(jù)The difficulty exists such as its rapid melting in warmer climates.可知這里想說但是他們提供的水將比它們所能生產(chǎn)的水更便宜。故選D。