趣味青春英语电台 第167期:On your toes(在线收听

   Idiom:

  On your toes一个人特别警惕,小心
  Hit the book:
  Blaze
  Fire engine
  Firefighter
  Breathing apparatus
  Tackle
  Extinguish
  Rescue
  Ringroad
  Wreck
  Paramedic
  Casualty
  原文地址:http://www.tingroom.com/lesson/qwqcyy/338930.html