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          ----Where is your sister?  
          -----She _________ my mom with cooking. 
          A．is helpingB．helpingC．is helpD．helps
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          考查時態(tài)。句意：---你的妹妹在哪兒？---她正在幫助我的媽媽做飯。故選A，用現(xiàn)在進行時。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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