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          —Is Tony good at _________?
            
          —Yes，he is．I often hear him _________ in the neat room．
            
          A．singing；sing                   B．sing；sing
            
          C．singing；to sing                    D．to sing；singing
            
            
         
        
         			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				  
            
          1、A
            
            				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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          —Is Tony good at _________?
            
          —Yes，he is．I often hear him _________ in the neat room．
            
          A．singing；sing                   B．sing；sing
            
          C．singing；to sing                    D．to sing；singing
          

			
          
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