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           How can they expect to learn anything ________ they never listen?
          A．whetherB．when
          C．butD．unless
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          B 考察狀語從句。When在句中表示既然。句義：既然他們從不講，他們?cè)趺粗竿軌驅(qū)W到東西呢？
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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