55. (    )

17. I like to talk to my parents, (   ) I do not like them to add their ideas to me. 

• A、but
  
  

• B、because
  
  

• C、and
  
  

• D、so
  
  

48. "Brain wave"machines may show (   ).

• A、the last one or two minutes of one's dream
  
  

• B、the story which lasts for hours or even days
  
  

• C、how long a dream lasts
  
  

• D、the explanations of one's dream