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          Half of the work ______ by now.
           A. has finished              B. has been finished       C. have been finished
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          考查動詞的被動語態(tài)。 句意：一半的工作已經(jīng)被完成。可知要用被動語態(tài)結(jié)構(gòu)，work是不可數(shù)名詞，所以用單數(shù)has been finished，故選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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