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          While she _____ TV, someone _______ at the door.
          A．watch, knockedB．was watching, knocked
          C．watching, knockingD．was watching, is knocking
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B 

          試題分析: 句意：當(dāng)她在看電視時，有人敲門。knock at 敲門；while當(dāng)……的時候，引導(dǎo)的時間狀語從句動詞為延續(xù)性動詞，進(jìn)行時態(tài)，與主句同時發(fā)生，故選B
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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