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          —How clean the room is!   —Yes，I am sure that someone _______ it.
          A．cleansB．cleaned
          C．has cleanedD．had cleaned
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：句意:-這個(gè)房間多么干凈啊！-是的，我確信有人打掃房間了。clean是一個(gè)動(dòng)詞，意思是打掃。根據(jù)句意可知，現(xiàn)在房間非常的干凈，所以應(yīng)該是有人已經(jīng)打掃過(guò)了，故應(yīng)該用現(xiàn)在完成時(shí)，故選C。A是一般現(xiàn)在時(shí)；B是一般過(guò)去時(shí)；D是過(guò)去完成時(shí)。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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