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          —Hi, why are you here?
          —I ________ for Susan for 15 minutes.
          A. have been waiting   
          B. have waiting   
          C. am waiting
          D  am been waiting   
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A 
          本題考查動(dòng)詞時(shí)態(tài)。題意為“—你好，你為什么在這？—我已經(jīng)等蘇珊等了15分鐘了。”“for + 一段時(shí)間”和現(xiàn)在完成時(shí)連用，排除C選項(xiàng)；現(xiàn)在在完成進(jìn)行時(shí)表示已經(jīng)做了某事，并且一直在做某事，此處表示一直在等，所以現(xiàn)在我完成進(jìn)行時(shí)符合題意。故選A
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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