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          The problem of air pollution is becoming more serious ______ the increasing number of cars.
          A．a(chǎn)s for B．becauseC．a(chǎn)s a resultD．a(chǎn)s a result of
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          本題的含義為由于車(chē)子數(shù)量急劇增加的結(jié)果，空氣污染的問(wèn)題變得更加嚴(yán)重，as a result of 表示由于……的結(jié)果的含義，故本題選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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