55. (   )

49. "Feel out of sorts", as it is used in the second paragraph, could best be replaced by (   ).

• A、put things in order
  
  

• B、are in a bad mood
  
  

• C、search for tranquilizers
  
  

• D、want a mood-raiser
  
  

48. It can be inferred from the passage that (   ). 

• A、when one is in a bad mood, he or she may not work very well
  
  

• B、the best way to overcome a bad mood is to talk to oneself
  
  

• C、some drugs are more effective than physical exercises
  
  

• D、taking drugs is at the risk of being poisonous