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          Our knowledge of computers __________ growing all the time.
          A．be
          B．is
          C．a(chǎn)re
          D．were
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          由all the time 可知本句要用現(xiàn)在進(jìn)行。knowledge是不可數(shù)名詞，故be動詞用is。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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