新视野大学英语读写教程问题详解unite8.doc

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1.
Scientists have recently turned their attention to natural of energy: the sun, the sea, the wind, and hot springs.
 
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sources
 
sources
2.
If present directions continue, the world in the years ahead will be more crowded, more polluted, and less ecologically (生态上) than the world we live in now.
 
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stable
 
stable
3.
Coal was formed out of dead forests by a long slow of chemical change.
 
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process
 
process
4.
The children will now play some pieces of music that they themselves.
 
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posed
 
posed
5.
The boy is quite interested in the behavior of birds.
 
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observing
 
observing
6.
On their own they work well, but in they're a disaster.
 
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bination
 
bination
7.
The population in the past two decades accounts for the lack of food and health care in many parts of the world.
 
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explosion
 
explosion
8.
The United Nations came into in 1945.
 
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existence
 
existence
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9.
I had forgotten all about it because I had been so with other things.
 
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occupied
 
occupied
10.
The government is considering a job program to help young people get employed.
 
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creation
 
creation
11.
The crowd out from the gate and separated on the vast square in front of the cinema.
 
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occupy
 
surged
12.
Mark Twain's novel The Adventure of Tom Sawyer19th-century life in the United States.
 
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observe
 
exemplifies
13.
I can say with that the pany has been