From the text we know when bananas are harvested，they are．

• A、green and pointing upward  
  

• B、yellow and pointing downward

• C、green and pointing downward 
  

• D、yellow and pointing upward

  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。

_____you eat the correct foods_____be able to keep fit and stay healthy．

• A、Only if；you will 
  

• B、Only if；will you 
  

• C、Unless；you will
  

• D、Unless；will you