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           -May I watch TV now, Mum?
           -No, you_______. You_______ do your homework first.
          A. don't; must     B. don't; can't     C: can't, must     D. can't; can
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：句意：現(xiàn)在我可以看電視嗎，媽媽？不，你不能。你必須先做你的家庭作業(yè)。對(duì)may開頭的問句回答，否定形式常用can’t。所以選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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