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          _____ we got to the station, the train had left already. 

          A. If 
          B. Unless 
          C. Since 
          D. When 
          			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				D				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
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				科目：初中英語(yǔ)
				來(lái)源：同步題
				題型：單選題
			
          
									
          _____ we got to the station, the train had left already. 
          

          [     ]
          A. If 
          B. Unless 
          C. Since 
          D. When 
          

			
          
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