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54. (   )

12. The school has (   ) history of two (   ).

• A、/ ; hundred
  
  

• B、a; hundreds
  
  

• C、a ; hundred
  
  

• D、/; hundreds
  
  

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