符号说明
字母书写规则及练习
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
必修第二册
Unit 1 Cultural Heritage
Unit 2 Wildlife Protection
Unit 3 The Internet
Unit 4 History and Traditions
Unit 5 Music
必修第三册
Unit 1 Festivals and Celebrations
Unit 2 Morals and Virtues
Unit 3 Diverse Cultures
Unit 4 Space Exploration
Unit 5 The Value of Money
高频词汇
重点短语
