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          When I got there ,I saw some boys _____ on the playground.
          A．playingB．playedC．to playD．was waiting
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          此題重點考察固定結(jié)構(gòu)see sb doing sth 看到某人正在做某事
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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