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          Mr. and Mrs. Black ______ back _________.
          A．hasn’t come, yet
          B．haven’t come , yet
          C．haven’t come， already
          D．hasn’t come , already
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          Mr and Mrs Blacks構(gòu)成復(fù)數(shù)概念，故應(yīng)用haven’t；在完成時的否定中用yet，表示“還沒、尚未”，already 用在肯定句中，表示已經(jīng)。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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