前言
Unit 1  Education
Unit 2  The Olympics
Unit 3  Sports
Unit 4  Shopping
Unit 5  Travel
Unit 6  Meals and Restaurants
Unit 7  Medicine
Unit 8  Interview
Unit 9  Housing
Unit 10  Family
Unit 11  Entertainment
Unit 12  Holidays
Unit 13  Science
Unit 14  Fashion
Unit 15  Compute
Unit 16  Friendship
Unit 17  Animals and Pets
Unit 18  Environmental Protection
Unit 19  Disaste
Unit 20  Culture