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				4．--Do you know            or not it’s impolite to smoke during a meal in France?-- Yes.it's impolite．A．that         B．whether         C．if          D．why			【查看更多】
			


		
           
          


		
          
		
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          — Do you know _____ or not it's impolite to smoke during a meal in France? 
          — Yes, it's not impolite. 
          

          [     ]
          A. that 
          B. whether
           C. if 
          

			
          
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