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54. (   )

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
  
  

29. (   )

• A、over
  
  

• B、back
  
  

• C、into
  
  

• D、off