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(bǔ)因曉東來拜訪而自己不在家給他帶來的沮喪。

Many children,_____ parents are away working in big cities, are taken good care of in the village.

• A、of them 
  

• B、whose

• C、their 
  

• D、with whom