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          —Must I finish the exercise this afternoon?
          —Yes, you ______, but you ______ finish it now.
          A．must, mustn’tB．must , don’t have to
          C．may, needn’tD．may , mustn’t
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          考查情景交際�！拔医裉煜挛绫仨毻瓿删毩�(xí)嗎？”“是的，你必須，但是你現(xiàn)在不比。”用must提問(wèn)，肯定回答還用must，否定回答用needn’t或don’t have to。mustn’t“禁止”，否定回答不用mustn’t，排除A。故選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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