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          The Dongying-Hainan airline         for about 5 months. I have taken the flights three times. 
          A．is open B．has opened C．has been open D．has been opened 
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          

          解析試題分析：句意：東營海南航空公司已經(jīng)開通大約5個月了，我已經(jīng)乘坐過3次了。完成時for加一段時間要求謂語動詞是持續(xù)或表示狀態(tài)的，結(jié)合語境故選C。
          考點：考查動詞時態(tài)。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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