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    完形填空。
         Earthquakes are   1  ; thousands of them happen each day. But most are too weak to feel. During a big
    earthquake. there is often a great noise first. Then the earth   2   terribly; many houses fall down. Railway
    tracks break and trains go   3   lines; a great many factories are   4  ; thousands of deaths are caused, and
    many more lose homes...   5   the great damage and deaths caused by the earthquake itself, other disasters
    such as fires often   6  . More buildings are destroyed and more   7   are caused.
         It is well known of the   8   of a possible earthquake, and for centuries man has been making researches
    on earthquakes. More than 2,000 years ago,   9  , a Chinese scientist named Zhang Heng invented a machine
    which could find out from which  10  the seismic (地震的) waves had come, and this machine is still  11  
    by scientists today. Now we know much more about earthquakes and  12  they happen, but we still cannot
    tell exactly when and where an earthquake will happen, and cannot  13  it from happening. So earthquakes
    are among the  14  disasters in the world.
         No one can stop natural earthquakes.  15 , scientists can help stop earthquakes destroying whole cities
    and causing too many deaths.
    (     )1. A. common     
    (     )2. A. moves      
    (     )3. A. off        
    (     )4. A. burst      
    (     )5. A. Except     
    (     )6. A. follow     
    (     )7. A. quakes     
    (     )8. A. information
    (     )9. A. as a result
    (     )10. A. country   
    (     )11. A. imported  
    (     )12. A. where     
    (     )13. A. make      
    (     )14. A. worst     
    (     )15. A. However        		B. unusual   
    B. shakes    
    B. on        
    B. hurt      
    B. Besides   
    B. copy      
    B. deaths    
    B. questions    
    B. in fact   
    B. directions
    B. repaired  
    B. when      
    B. prepare   
    B. best      
    B. But            		C. strange     
    C. jumps       
    C. into        
    C. destroyed   
    C. Instead     
    C. come        
    C. difficulties
    C. dangers     
    C. for example   
    C. ways        
    C. protected   
    C. what        
    C. stop        
    C. most        
    C. And              		D. familiar   
    D. breaks     
    D. behind     
    D. buried     
    D. Because of             
    D. enter      
    D. results    
    D. shock      
    D. as well    
    D. city       
    D. used       
    D. why        
    D. let        
    D. fast       
    D. So         
    1. A 2. B 3. A 4. C 5. B 6. A 7. B 8. C 9. C 10. B 11. D 12. D 13. C 14. A 15. A
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