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          【題目】It was nearly a week _______ the rescue team located the crashed plane.
          A. since B. before
          C. until D. after
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          【答案】B
          【解析】
          考查時間狀語從句。A. since自從；B. before在……之前；C. until直到；D. after在……之后。句意：救援隊花了將近一周的時間才找到墜毀的飛機。It is/was+一段時間+before表示“距某發(fā)生有……的時間”，故B項正確。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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