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				21．―          ?―Yes.I'm  looking for a pen．A．Can I help you                    B．What are  you doing?C．What do you want to buy              D．What do  you like?			【查看更多】
			


		
     
    


		
    
		
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    — _________?
      
    —Yes，I'm looking for a pen．
      
    A．Can I help you                                         B．What are you doing?
      
    C．What do you want to buy                           D．What do you like?
    

			
    
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