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				34．――When      for Beijing?――On Sunday．They are  now busy preparing for their trip．A．did they leave                      B．have they  leftC．were they leaving                    D．a(chǎn)re they  leaving			【查看更多】
			


		
     
    


		
    
		
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    ——When         for Beijing?
      
    ——On Sunday．They are now busy preparing for their trip．
      
    A．did they leave                                             B．have they left
      
    C．were they leaving                                        D．a(chǎn)re they leaving
    

			
    
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