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           — Could I clean the bedroom for you?
          — No, thanks. I            it myself.
          A．cleanedB．have cleanedC．was cleaningD．had cleaned
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          本題考查時態(tài)。根據(jù)句意可知我已經(jīng)掃過了，故用現(xiàn)在完成時。句意：——我可以為你臥室打掃嗎？——不，謝謝，我已經(jīng)掃過了。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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