目录 字母练习1 必修第一册 Welcome Unit5 Unit 1 Teenage Life7 Unit 2 Travelling Around10 Unit 3 Sports and Fitness12 Unit 4 Natural Disasters15 Unit 5 Languages Around the World18 必修第二册 Unit 1 Cultural Heritage21 Unit 2 Wildlife Protection24 Unit 3 The Internet28 Unit 4 History and Traditions31 Unit 5 Music34 必修第三册 Unit 1 Festivals and Celebrations37 Unit 2 Morals and Virtues41 Unit 3 Diverse Cultures45 Unit 4 Space Exploration48 Unit 5 The Value of Money51
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