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          It was several minutes ____we realized what was happening-our dog was trapped in a newly-dug tunnel.
          A．sinceB．beforeC．untilD．while
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：句意：過了幾分鐘我們才意識到發(fā)生了什么—我們的狗被新挖的隧道困住了。這里使用了句型：It was+一段時間+before…，“要多久…才/就…”,所以選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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