完形填空(七) 绿色冰山+励志故事
A [2020·原创]
What color are icebergs(冰山)? White or blue? 1 , there are green icebergs in Antarctica(南极). Their unusual color has confused scientists for decades. But scientists have finally 2 the mystery of the green icebergs.
Most icebergs are white. There are also many icebergs in Antarctica that are blue. Glacial ice contains 3 small air bubbles(气泡). The icebergs appear to be blue because the air bubbles reflect blue light.
4 , there are no air bubbles in green icebergs, which means these icebergs are made out of sea ice rather than glacial ice.
But why does sea ice look green? 5 at the University of Washington, US, recently found the reason—iron oxide(氧化铁). It 6 rock dust found on the Antarctic mainland.
After studying the green icebergs, scientists found that they have 500 times more iron than glacial ice, 7 Newsweek. The iron comes from bedrock in the ocean. When glaciers grind(碾磨) against bedrock, a powder(粉末) that is rich in iron 8 . The powder later mixes with ocean water, and then it freezes as green sea ice, Stephen Warren from the university suggested.
This is an important finding, as these green icebergs can 9 iron to far parts of the ocean. There, tiny sea plants use the iron as 10 food. “We thought green icebergs were just a curiosity,” Warren said to Newsweek. “But now they may actually be important.”
( )1.A. Probably B.Surprisingly C.Suddenly D.Hardly
( )2.A. figured B.done C.found D.solved
( )3.A. a lot of B.few C.a lot D.a little
( )4.A. And B.So C.However D.Also
( )5.A. Doctors B.Teachers C.Scientists D.Students
( )6.A. comes in B.comes on C.comes out D.comes from
( )7.A. according to B.in spite of C.instead of D.in addition to
( )8.A. creates B.is created C.created D.create
( )9.A. give B.make C.put D.bring
( )10.A. / B.the C.a D.an
B [2020·原创]
Bob is a boy who likes climbing. He had tried to climb the snowy mountain many times, but he had 1 reached the top. His friend Peter encouraged Bob 2 again. He gave Bob a pair of glasses and said, “If it starts clouding over, put on the glasses, or if your feet start hurting, put them on too. The glasses are very 3 . They’ll help you.” Bob accepted the gift without much thought.
The day came when he was to have 4 try. Two hours later, he felt his feet hurting. Then he remembered what Peter had said, and put on the glasses. The pain was pretty bad, but 5 the sunglasses he could clearly see the snow-covered mountain top, so he went on.
Unluckily, clouds were gathering. But this time Bob could still 6 the top through the clouds. He kept climbing, and finally arrived at the top. His feeling of 7 was good. He couldn’t believe that the clouds were as 8 as that, so he looked more closely at the glasses, and discovered the secret. Peter had engraved (镌刻) the snow-covered mountain top on the glasses, and Bob could see it when he was looking upwards!
Bob realized that the only 9 to reach the top had been losing heart when he couldn’t see the mountain top. He was 10 that Peter had used that little trick to help him see that aim, and in fact it was still there.
( )1.A. ever B.never C.often D.already
( )2.A. tried B.to be tried C.try D.to try
( )3.A. special B.safe C.popular D.real
( )4.A. another B.other C.the others D.others
( )5.A. under B.with C.for D.in
( )6.A. reach B.leave C.see D.get
( )7.A. freedom B.decision C.success D.failure
( )8.A. thickest B.thicker C.thickly D.thick
( )9.A. difficulty B.way C.decision D.chance
( )10.A. helpful B.thankful C.hopeful D.wonderful
