The main idea of this passage is that．

• A、many animals die during hibernation
  
• B、hibernation protects animals during the wintertime
  
• C、scientists feel puzz1ed about hibernation
  
• D、some bats hibenlate and others do not

The real power of words exists in their．.

• A、accuracy  
  

• B、beauty
  

• C、charm 
  

• D、representative function

  你是劉玲(Liu Ling)，寫一封給曉東(Xiao Dong)的道歉信，講明道歉的原因、解決問題的辦法，以彌補因曉東來拜訪而自己不在家給他帶來的沮喪。