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    Dr. Ma used to __________in a hospital.
    


    
 
    
  
  
    A．work
    
      		
  
  
    B．works
    
      		
  
  
    C．worked
    
      		
  
  
    D．working
    
      		
 
    

    


     
    			
    


			
    

		
    
		
		
	
    
		
    
			
    
				
    
				【答案】






    A
    


    【解析】
    


    試題分析:此題考查的重點(diǎn)是used to do sth表示過(guò)去經(jīng)常做某事,故選A表示馬先生過(guò)去在醫(yī)院里工作.
    


    考點(diǎn)：used
to do sth的基本用法.
    


    點(diǎn)評(píng)：used
to do sth表示過(guò)去常常做某事,其否定式和一般疑問(wèn)句的形式有時(shí)要借助助動(dòng)詞do的形式,構(gòu)成didn’t use  to  do
sth和did …use to do
sth的結(jié)構(gòu)。還要區(qū)分與be used
to doing sth的區(qū)別。
    


     
    				
    
							
    
			
    
			
    
			
			
    
		
    
	
    

		
    

		





			
    
		
    
		
				
    
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