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          Our country _______ a lot in the last fifty years. 
          A．will changeB．changedC．changesD．has changed
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意是：我們國(guó)家在過(guò)去的五十年發(fā)生了許多變化。結(jié)合語(yǔ)境及時(shí)間狀語(yǔ)in the last fifty years可知描述的是一直持續(xù)到現(xiàn)在的動(dòng)作，故用現(xiàn)在完成時(shí)態(tài)，故選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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