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 Computers
Unit 16 Friendship
Unit 17 Animals and Pets
Unit 18 Environmental Protection
Unit 19 Disasters
Unit 20 Culture
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