55. (   )

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
  
  

8. Chinese teaching is not only (   ) art but also as (   ) science. 

• A、 the; the
  
  

• B、an; /
  
  

• C、an; a
  
  

• D、the; a