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          It _______ long ______ we know the result of the experiment.
          A．will not be, beforeB．is, afterC．will not be, untilD．is, before
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          before表示在···之前，本題使用一般將來(lái)時(shí)，故選答案為A。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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