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The fastest way to travel to Shanghai is _______ air．

[　　]

A．in

B．by

C．on

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科目：初中英語 來源：期末題 題型：完形填空

完形填空。
     The population problem may be the     1    , one of the world today.  The world'spopulation    2  
growing    3   .  Two   34  years ago, there were only 250 million people   5   the earth. Four hundred
years ago,    6    number was     7   500 million.  But at the beginning of the     8    century, the world's
population was about 1,700 million.  In 1970, this number was 3,600 million.  In 1990, the number was
five billion.  A   9   report says   10   the world population will   11   six billion by the end of the 20th
century.  This is just ten    12   after it   13   five billion.  People say that   14   the year 2011,   15   may
be seven billion.
(     )1. A. great            
(     )2. A. is              
(     )3. A. faster and faster
(     )4. A. thousand        
(     )5. A. in              
(     )6. A.a                
(     )7. A. nearly          
(     )8. A. twenty          
(     )9. A. USA              
(     )10. A. what            
(     )11. A. pass            
(     )12. A. weeks            
(     )13. A. get              
(     )14. A. .by              
(     )15. A. this             		B.  greater    
B. are        
B.  fast and fast
B.  thousands  
B.on          
B. an          
B.almost      
B.  twelve    
B. UN          
B.if          
B.passes      
B.months      
B.gets        
B.until        
B. it          		 C.  greatest            
C. be                  
C.  fastest and fastes  
C.  thousand of        
C.   at                
C. the                  
C.over                  
C.  twentieth          
C. PRC                                           
C.that                  
C.passed                
C.years                
C.reached              
C.when                  
C. one                  

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