本讲为2007年上半年新的教学内容，请对照教材听录音！
  Seek--- sought--- sought
  Lay---laid---laid
  Lie---lay---lain
  Lie---lied---lied
  Autumn---fall
  Fall---fell---fallen
  In case
  In the case----in this case
  He succeeded in finishing the paper.
  Take : The paper took me 3 days.
  The dictionary took me 50 yuan.
  Cost : It cost too much.
  Spend
  I spent 3 days in writing the paper.
  I spent 50 yuan on the dictionary.