13. It was buying game cards that cost Jim most of the money that he (   ) on learning. (   ) 

• A、might have spent
  
  

• B、must have spent
  
  

• C、should have spent
  
  

• D、 would have spent
  
  

53. (    )

4. (   )

• A、comb
  
  

• B、globe
  
  

• C、smoke
  
  

• D、clock