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          Beijing is one of the _______ in the world today. 
          A．busiest cityB．busiest citiesC．busy cityD．busy cities
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：句意：北京市當(dāng)今世界最繁忙的城市之一。One of+可數(shù)名詞復(fù)數(shù)表示“……之一”。busiest是busy的最高級，前要用定冠詞the。故選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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