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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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