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           —How was that?
           —I was chatting on line ______ the power went out.
          A．becauseB．whileC．a(chǎn)sD．when
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D 

          試題分析：考查連詞：A. because因為，B. while當(dāng)…時候，雖然，然而，C. as隨著，因為，正如，D. when當(dāng)…時候，句意：怎么了？--我正在聊天這時停電了。When引導(dǎo)時間狀語，表示時間點，這里翻譯成“這時”，while引導(dǎo)時間狀語從句，表示“一段時間”，as引導(dǎo)時間狀語從句，表示“兩個動作同時發(fā)生”，選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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