本讲为2007年上半年新的教学内容，请对照教材和练习册听录音！
   
  base A on B
  A is based on B
  Be based on
  Highly limited
  High  highly
  Every one wants to fly ___ (high).
  He speaks ____ (highly) of me.
  How, who, when, where, why, which, what + to
  I don’t know how to do it.
  Whom
  Benefit