The concept of obtaining fresh water from iceberg that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.
line (5) Glaciers are a possible source of fresh water that have been overlooked until recently. <A>
Three-quarters of the Earth's fresh water supply is still tied up in glacial ice,
a reservoir of untapped fresh water so immense
that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons
of ice encased in 10,000 icebergs that break away from the polar
ice caps, more than ninety percent of them from Antarctica. <B>
(10) Huge glaciers that stretch over the shallow continental shelf give
birth to icebergs the year. Icebergs are not like sea ice, which is formed when
the sea itself freezes ; 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, throughout pulled by subsurface currents. Because they melt more slowly than
smaller pieces of ice, icebergs
(15) have been known to drift as far north as 35 degrees south of the
equator in the Atlantic
Ocean. <C>
The difficulty arises in other technical matters, such as the
prevention of rapid melting in warmer climates and the
funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could
provide would be far cheaper than that produced by
desalination, or removing salt from water. <D>
Questions
36. What is the main topic of
the passage?
(A) The movement of glaciers
(B) Icebergs as a source of fresh water
(C) Future water shortages
(D) The future of the world's rivers
37. The word “arid” in line 1 is closest in
meaning to
(A) anhydrous
(B) fruitful
(C) remote
(D) distant
38. The word "it" in line 3 refers to
(A) an iceberg that is towed
(B) obtaining fresh water from icebergs
(C) the population of arid areas
(D) real life
39. According to the author, most of the world's fresh water is
to be found in
(A) oceans
(B) rivers
(C) glaciers
(D) reservoirs
40. The word “currents” in line 14 is closest in meaning to
(A) pulls
(B) waves
(C) weather
(D) flows of water
41. How are icebergs formed?
(A) They break off from glaciers
(B) Seawater freezes
(C) Rivers freeze
(D) Small pieces of
floating ice converge
42. With which of the following ideas would the author be likely
to agree?
(A) Towing icebergs to dry areas is economically possible.
(B) Desalination of water is the best way to obtain drinking
water.
(C) Using water from icebergs is a very short-term solution
to water shortages.
(D) Icebergs could not be towed very far before they would
melt.
43. Which of the following is the best place where the sentence
"To
corral them and steer them to parts of the world where they are
needed
would not be too difficult."
will most properly fit ?
(A) <A>
(B) <B>
(C) <C>
(D) <D>
44. The word "that" in the last line refers to
(A) the volume
(B) the water
(C) the iceberg
(D) the towing
Please tally your answer with the below provided answers and
then comment here how much you got!
Answers
36. B 37. A 38. B 39. C 40. D 41. A 42. A 43. C 44. B
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