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          —How long will you graduate from senior middle school?
          —It will be less than one year________I graduate.
          A．when　B．that
          C．beforeD．since
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          考查狀語從句。這里before引導時間狀語從句，此處“It will be＋一段時間＋before...”，表示“還有多久就”，還有不到一年時間我就要高中畢業(yè)了。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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