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				17．A．before         B．when          C．since          D．until			【查看更多】
			


		
           
          


		
          
		
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          ---________ when does that shop stay
open?       ---About midnight.
          


          
 
          
  
  
          A．Since
          
            		
  
  
          B．Until
          
            		
  
  
          C．Before
          
            		
  
  
          D．After
          
            		
 
          

          


           
          

			
          
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          Rick has learned a lot about Chinese culture _____ he came to China.
          A．before  B．when C．until D．since 
          

			
          
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          It's five years ________ I came to this town．
          

          

          [　　]
          

          A．since
          

          

          B．when
          

          

          C．before
          

          

          D．until
          

          

          

			
          
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          The foreign teachers have worked in that school ________ last year．
          

          

          [　　]
          

          A．since
          

          

          B．when
          

          

          C．before
          

          

          D．until
          

          

          

			
          
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          — You speak French so well. How long have
you learned it? 
          


          — ________ I was fifteen.
          


          
 
          
  
  
          A．Until
          
            		
  
  
          B．Since
          
            		
  
  
          C．When 
          
            		
  
  
          D．Before
          
            		
 
          

          


           
          

			
          
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