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           The air in Rizhao is getting much _____ now than a few years ago .
          A．cleanB．cleanerC．cleanestD．the cleanest
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：句意：現(xiàn)在日照的空氣比起幾年前的空氣變得更加清新了。分析：考查比較級(jí)的用法，現(xiàn)在的空氣和幾年前的空氣進(jìn)行比較，運(yùn)用比較級(jí)。Clean的比較級(jí)在后接er, 因此選擇第二項(xiàng)。故選 B
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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