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           Some people never know what they need ______ they lose it.
          A. until                        B. as                           C. after
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A

          試題分析：until直到，as當，after在……之后，句意：一些人直到丟失了什么才知道他們需要什么。故選A。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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