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was once treated as a joke more fit for cartoons than real life. But now it is being consid ered 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.
Glaciers (冰川) 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, a reservoir of untapped fresh
water so huge that it could carry on all the rivers of the world for 1,000 years.
Floating on the oceans every year are 7,659 trillion metric tons ofice covered in 10,000 icebergs that break
away from the polar ice caps, more than ninety percent of them from Antarctica.
Huge glaciers that widen over the shallow continental shelf give birth to icebergs throughout 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 flow away from the polar region, icebergs
sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they
melt more slowly than smaller pieces office, icebergs have been known to drift as far north as 35 degrees
south of the equator in the Atlantic Ocean. To hold them and guide them to parts of the world where they are
needed would not be too difficult.
The difficulty appears in other technical matters, such as the prevention of rapid melting in warmer
climates and the guiding of fresh water to shore in great volume. But even if the icebergs lost half of their
volume in drawing, the water they could provide would be far cheaper than that produced by removing salt
from water.
B. The huge glaciers bring too many floods recently.
C. The warning from scientists and the serious situation.
D. There are too many icebergs waiting for being dealt with.
B. succeeding in passing
C. taking seriously
D. failing to notice
B. Climate changes and practical actions.
C. The slow moving speed of the icebergs.
D. The time of waiting the icebergs' melting.
B. Get Fresh Water From Icebergs
C. Solve the Problem of Water Shortage
D. Look for a Better Way to Get Water
At one time no one could travel on an English road faster than four miles an hour. That was the law until 1896. A man had to walk in front of a car which could not go faster than the man. At night the man had to carry a red lamp.
Once Charles Rolls brought a car from France to England, but he wanted to drive faster than four miles an hour .In order to have no trouble with the police, he had a talk with some of the police officers, who ordered their policemen to look the other way when the car came along the road. This was a good plan in the country, but not so easy to follow in the busy streets of London.
One night Rolls and some friends started from London on their journey to Cambridge. One of the men walked in front with the red lamp, but he walked as fast as he could. The police became very interested in walls and shop-fronts when they heard the car, and not one of them saw it.
They reached a hill; but what a waste of time it was to drive down the hill at four miles an hour! Rolls was getting ready to jump into the car; but then he noticed a policeman who was not looking the other way. The slow car reached him.
“Good evening,” said the policeman, looking at the car.
“Good evening,” said Rolls, holding the lamp.
“One of these horseless things,” said the policeman, looking at it with interest.
“Yes,” said Rolls, and waited.
“I’ve often wanted a ride in one; but of course policemen can’t buy things like that.” He turned and looked hopefully in Rolls’s face.
“Jump in,” said Rolls.
“Thanks,” said the policeman, and did so. “Now,” he said, sitting down, “you can let it go just as you like down this hill. There isn’t another policeman on this road for a mile and a half.”
60．The policemen were told “to look the other way” (the underlined part in Paragraph 2) so that .
A．they could watch the car coming from the other direction
B．the car could go faster than four miles an hour
C．they could make sure no one was in the way
D．the car would not hit them on the road
61．In what way did the policemen carry out the order from their officers?
A．They greeted Rolls when the car came along.
B．They walked in front of the car with a red lamp.
C．They pretended to be attracted by something else.
D．They stood on duty every 1.5 miles along the road.
62．The policeman who said “Good evening” to Rolls wanted to .
A．teach Rolls a lesson B．take a free ride home
C．have a talk with Rolls D．have a car ride experience
63．After the policeman jumped into the car, Rolls .
A．dared not drive the car faster than he was allowed to
B．could drive as fast as he wished within a certain distance
C．could drive on any road he liked for the rest of the journey
D．drove his car as fast as he could down the hill to Cambridge
查看习题详情和答案>>The crazy fans ________ patiently for two hours, and they would wait till the movie star arrived．
- A.were waiting
- B.had been waiting
- C.had waited
- D.would wait
A Strange Greeting, a True Feeling Last week I was invited to a doctor’s meeting at the Ruth hospital for incurables. In one of the wards a patient, an old man, got up shakily from his bed and moved towards me. I could see that he hadn't long to 1 , but he came up to me and placed his right foot close mine on the floor.
“Frank！” I cried in astonishment. He couldn’t 2 , as I knew, but all the time 3 his foot against mine.
My 4 raced back more than thirty years to the 5 days of 1941, when I was a student in London. The 6 was an air-raid shelter, in which I and about hundred other people slept every night. Two of the regulars were Mrs. West and her son Frank.
7 wartime problems, we shelter-dwellers got to 8 each other very well. Frank West 9 me because he wasn’t 10 , not even at birth. His mother told me he was 37 then, but he had 11 of a mind than a baby has. His “ 12 ” consisted of rough sounds——sounds of pleasure or anger and 13 more. Mrs. West, then about 75, was a strong, capable woman, as she had to be, of course, because Frank 14 on her entirely. He needed all the 15 of a baby.
One night a policeman came and told Mrs. West that her house had been flattened by a 500-pounder. She 16 nearly everything she owned.
When that sort of thing happened, the rest of us helped the 17 ones. So before we 18 that morning, I stood beside Frank and 19 my right foot against his. They were about the same size. That night, then, I took a pair of shoes to the shelter for frank. But as soon as he saw me he came running and placed his right foot against mine. After that, his 20 to me was always the same.
( )1. A. work B. stay C. live D. expect
( )2. A. answer B. speak C. smile D. laugh
( )3. A. covering B. moving C. fighting D. pressing
( )4. A. minds B. memories C. thoughts D. brains
( )5. A. better B. dark C. younger D. old
( )6. A. cave B. place C. sight D. scene
( )7. A. Discussing B. Solving C. Sharing D. Suffering
( )8. A. learn from B. talk to C. help D. know
( )9. A. needed B. recognized C. interested D. encouraged
( )10. A. normal B. common C. unusual D. quick
( )11. A. more B. worse C. fewer D. less
( )12. A. word B. speech C. sentence D. language
( )13. A. not B. no C. something D. nothing
( )14. A. fed B. kept C. lived D. depended
( )15. A. attention B. control C. treatment D. management
( )16. A. lost B. needed C. destroyed D. left
( )17. A. troublesome B. unlucky C. angry D. unpopular
( )18. A. separated B. went C. reunited D. returned
( )19. A. pushed B. tried C. showed D. measured
( )20. A. nodding B. greeting C. meeting D. acting
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