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          精英家教網 > 初中英語 > 題目詳情
          
			
          
				
          ——Why is the classroom so dirty?
          ——Sorry, Sir. It _____ yesterday. We forgot to do it.
          A．doesn't cleanB．didn't cleanC．isn't cleanedD．wasn't cleaned
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          本句子考察的是一般過去時的被動態(tài)，其結構主語+was/were+動詞過去分詞，根據中的yesterday，可推知。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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