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				18．―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			【查看更多】
			


		
     
    


		
    
		
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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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