必修第一册
Welcome Unit
Unit 1 Teenage Life
Unit 2 Travelling Around
Unit 3 Sports and Fitness
Unit 4 Natural Disasters
Unit 5 Languages Around the World
综合练习一
必修第二册
Unit 1 Cultural Heritage
Unit 2 Wildlife Protection
Unit3 The Internet
Unit 4 History and Traditions
Unit5 Music
综合练习二
必修第三册
Unit 1 Festivals and Celebrations
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