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          The city of Qingdao has been working on building itself up as a city of sails ________ it successfully hosted the 2008 Olympics’ sailing program.
          A．a(chǎn)fterB．sinceC．whenD．until
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：考查連詞。題意：自成功舉辦08奧運(yùn)游泳項(xiàng)目以來，青島一直致力于建設(shè)航海城�，F(xiàn)在完成進(jìn)行時(shí)has been working提示用since引導(dǎo)狀語從句。故B項(xiàng)正確。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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