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          When I came back yesterday evening, my brother ________ his homework. 
           A is doing   B. has done   C. was doing 
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          時態(tài)的用法。句意：當我昨天晚上到的時候，我的哥哥/弟弟正在做家庭作業(yè)。根據(jù)句意，應該用過去進行時，故答案為C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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