Air and water     __   are still serious problems in many developing countries. 

Air and water     __   are still serious problems in many developing countries. 

题型:同步题难度:来源:
Air and water     __   are still serious problems in many developing countries.      [     ]
A. pollution                
B. accident    
C. development              
D. height
答案
A
举一反三
We must realize the _____ of protecting our environment.  [     ]

A. difference                    
B. development  
C. importance                        
D. pleasure

题型:同步题难度:| 查看答案
If anyone comes to see me this afternoon, please ask him or her to leave a        .      [     ]
A. letter              
B. message      
C. sentence            
D. notice
题型:同步题难度:| 查看答案
—Please give me a          when you arrive.   
—OK.I’l1 tell you everything as soon as I get there.      [     ]
A. ring              
B. present      
C. hand              
D. ricle
题型:同步题难度:| 查看答案
—Why didn"t you buy a ticket for your son?
—They allow a(n)_____to take a child under 1.2 m onto the train for free.   [     ]
A. kid    
B. teenager    
C. expert    
D. adult
题型:同步题难度:| 查看答案
He is going to the town for the _____of buying a computer for his son.    [     ]
A. advice    
B. need    
C. purpose    
D. desire
题型:同步题难度:| 查看答案
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