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          Tony is busy _______ his homework.
          A．doingB．doC．to doD．does
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          考查非謂語(yǔ)動(dòng)詞。句意：托尼正忙著做他的作業(yè)�，F(xiàn)在分詞作補(bǔ)足語(yǔ)表示正在進(jìn)行的伴隨性動(dòng)作，固定句型結(jié)構(gòu)be busy doing sth表示忙于做某事。故選A。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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