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				23．---             have you  been skating?---I’ve been skating since nine o’clock.   A．How long          B．How far            C．How often   D．How soon			【查看更多】
			


		
           
          


		
          
		
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          ---____________ have you been skating?
            
          ---I’ve been skating since nine o’clock.
            
          A．How long             B．How far                   C．How often           D．How soon
          

			
          
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