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          It is said that potato chips ____________ by mistake about a hundred years ago.
          A．inventB．inventedC．a(chǎn)re inventedD．were invented
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          考察時態(tài)及語態(tài)。句意；據(jù)說炸薯片是100年前錯誤的被發(fā)明的。結(jié)合語境可知本句描述的是過去的狀態(tài)，故用一般過去時態(tài)。句子主語是動作對象，故用被動語態(tài)。選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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