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				30．--When did your mother do  her housework?--          ．A．Two hours ago                    B．In an  hourC．Two hours                         D．In two  hours ago			【查看更多】
			


		
           
          


		
          
		
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          --When did your mother do her housework?
            
          -- _________．
            
          A．Two hours ago                          B．In an hour
            
          C．Two hours                                  D．In two hours ago
          

			
          
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