One of the reasons why men invented certain sounds to express thoughts and actions isthat．

• A、they could agree upon certain signs  
  

• B、they could write them down
  

• C、they could communicate with each other 
  

• D、they could combine them

Michael：59?

• A、C
• B、F
• C、D
• D、B

  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。