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          ——Now lots of teenagers spend a lot of time playing computer games.
           ——Yes. Teachers and their parents should prevent them ______________ too much.
          A．to playB．playC．playsD．playing
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：prevent sb. (from )doing sth.表示“阻止某人做某事”，這是一個(gè)固定用法。本句的意思是“老師和家長(zhǎng)應(yīng)該阻止他們玩的太多�！彼员绢}選D。
          點(diǎn)評(píng)：對(duì)于prevent的用法，應(yīng)該熟練掌握，其用法與stop和keep的用法一樣，都表示“阻止某人做某事”。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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