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				21．--      I water the flowers every day?--No.you needn't．You can  water them 3 times a week．A．Must          B．May          C．Need           D．Can			【查看更多】
			


		
           
          


		
          
		
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          --          I water the flowers every day?
            
          --No，you needn't．You can water them 3 times a week．
            
          A．Must                   B．May                    C．Need                     D．Can
          

			
          
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