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          This chemical works _____.
            
                  A. is rebuilding   B. is being rebuilt    C.are being rebuilt    D. is being rebuilt
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
             
          解析:
               
          works指工廠，以復數(shù)形式出現(xiàn)，常作單數(shù)看待。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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