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				43．―What are the boys doing?―They are busy           the flew planted trees．A．water             B．to  water        C．watering         D．watered			【查看更多】
			


		
     
    


		
    
		
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    —What are the boys doing?
      
    —They are busy ________ the flew planted trees．
      
    A．water                         B．to water               C．watering                 D．watered
    

			
    
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