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          I'm sorry you've been waiting so long，but it'll still be some time ________ Brian gets back.
          A．beforeB．sinceC．tillD．a(chǎn)fter
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A

          句意：對不起，讓你等了這么長時間，但是，Brian還要過一段時間才能回來。本題應注意句型：It will be＋一段時間＋before從句，意為“要過多久才……”。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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