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          We have studied English _____2005.
          A．sinceB．forC．inD．on
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          since+過(guò)去的點(diǎn)時(shí)間，和現(xiàn)在完成時(shí)連用，故選A
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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