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          精英家教網 > 高中英語 > 題目詳情
          
			
          
				

          They discovered the cause of the fire accidentally. They discovered it _______.
          A．fortunatelyB．by chanceC．all of a suddenD．on purpose
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          考查短語辨析。Fortunately 幸運地，by chance 偶然地，all of a sudden 突然地，on purpose 故意地，句意：他們無意發(fā)現了大火的起因。他們偶然發(fā)現的。所以選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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