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				20．――Could you go to buy some  salt for my?  ――Sorry,  mum．I     my homework．A．a(chǎn)m doing       B．will  finish       C．was  doing       D．have finished			【查看更多】
			


		
           
          


		
          
		
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          ——Could you go to buy some salt for me?
            
          ——Sorry, mum．I       my homework．
            
          A．a(chǎn)m doing               B．will finish              C．was doing             D．have finished
          

			
          
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