42. What does the"law of nature"mean? You can find the answer in the passage in (   ) . 

• A、the second sentence
  
  

• B、the fifth sentence
  
  

• C、the seventh sentence
  
  

• D、the forth sentence
  
  

55. (    )

49. If a person says that he had a dream that lasted for four hours, (   ). 

• A、he is lying purposely
  
  

• B、he is trying to be funny
  
  

• C、he is honest and accurate(精確的)
  
  

• D、he is mistaken