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           —What’s your mother__________ now？
           —She’s __________ our house.
          A．doing, clean B．do; clean 
          C．does; cleans D．doing; cleaning
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：——現(xiàn)在你的母親正在干什么？——她正在打掃我們的房間。有時(shí)間副詞now來修飾，此處用現(xiàn)在進(jìn)行時(shí)，故選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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