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          ___ the employees' working efficiency, the supervisor will allow them to have a coffee break.
          A．ImprovingB．To improveC．Having improvedD．Improved
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          考察不定式做目的狀語。意思說：為了改善員工的工作效率，老板允許他們有喝咖啡休息時間.to do 可以表示為了…. 實(shí)際上等同于in order to，so as to.
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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