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				 A．a(chǎn)fter            B．before       C．since            D．until			【查看更多】
			


		
           
          


		
          
		
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          It' s two years ________ they left the city.
          

          [　　]
          

          

          A．a(chǎn)fter 
          B．before 
          C．until 
          D．since
          

          

          

          

			
          
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          It' s two years ________ they left the city.
          

          [　　]
          

          

          A．a(chǎn)fter 
          B．before 
          C．until 
          D．since
          

          

          

          

			
          
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           People won’t  see any flowers
____ May.
          


          
 
          
  
  
          A．before
          
            		
  
  
          B．a(chǎn)fter
          
            		
  
  
          C．until
          
            		
  
  
          D．since
          
            		
 
          

          


           
          

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


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

          


           
          

			
          
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          We have been good friends ________ we joined the same ping-pong team．
          

          

          [　　]
          

          A．after
          

          

          B．before
          

          

          C．since
          

          

          D．until
          

          

          

			
          
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