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          . — I sent him the dictionary by mail this morning . 
            
           —You ____ that; he''s coming tomorrow afternoon . 
            
           A . needn''t have done   B . didn''t have to    C . needn''t do   D . mustn''t do
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
             
          解析:
               
          表示“不必做某事但事實上已做了，”應用“needn''t +不定式的完成式”
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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