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


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          句意：東營(yíng)——海南航線已經(jīng)開通了五個(gè)月了。我已經(jīng)乘坐過這個(gè)航班三次了。結(jié)合語境可知本句描述的是現(xiàn)在已經(jīng)完成的動(dòng)作，用現(xiàn)在完成時(shí)態(tài)。主語是動(dòng)作對(duì)象，故用被動(dòng)語態(tài)。選Ｃ。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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