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          I was doing my homework while my parents __________ TV last night.
          A．watchedB．were watchingC．have watchedD．a(chǎn)re watching
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          本題的含義是昨天晚上我正在做作業(yè)的時候，我的父母在看電視的事應該正在進行，所以while引導的從句用過去進行時，結構為be+doing，主語是復數(shù)，be用were，故本題選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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