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          I ________my homework while my parents _________TV last night.
          A．did; have watchedB．was doing; were watching
          C．had done; were watchingD．would do ;were watching
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          while 連接前后的動作為同時發(fā)生的動作，故選B
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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