大学英语阶梯听力（1 基础训练）

Unit One Numers and Calculation(I)
Unit Two Numers and Calculation(II)
Unit Three Time and Dates
Unit Four Colors and Materials
Unit Five Sizes and Shapes
Review One
Unit Six Directions ans Positions
Unit Seven Food and Drink
Unit Eight Weather and Climate
Unit Nine Sports and Recreations
Unit Ten Hobbies and Interests
Unit Eleven Affirmation and Negation
Unit Twelve Transportation
Review Two
Unit Thirteen Argumentation
Unit Fourteen Feelings and Emotions
Unit Fifteen Opinons and Comments
Test 1 to Test 20