Exercise One

Exercise Two

Exercise Three

Exercise Four

Exercise Five

Exercise Six

Exercise Seven

Exercise Eight

Exercise Nine

Exercise Ten

Exercise Eleven

Exercise Twelve

Exercise Thirteen

Exercise Fourteen

Exercise Fifteen

Exercise Sixteen

Exercise Seventeen

Exercise Eighteen

Exercise Nineteen

Exercise Twenty

录音原文及答案

Exercise One

Exercise Two

Exercise Three

Exercise Four

Exercise Five

Exercise Six

Exercise Seven

Exercise Eight

Exercise Nine

Exercise Ten

Exercise Eleven

Exercise Twelve

Exercise Thirteen

Exercise Fourteen

Exercise Fifteen

Exercise Sixteen

Exercise Seventeen

Exercise Eighteen

Exercise Nineteen

Exercise Twenty

参考文献