Unit 1 School Life Unit 2 Sports Unit 3 People Unit 4 Health Unit 5 Health Problems Unit 6 Colleges and Universities Unit 7 Languages Unit 8 Fables and Fairy Tales Unit 9 Plants Unit 10 Nature Unit 11 Fashion Unit 12 Great Inventions Unit 13 Medical Problems Unit 14 Geography Unit 15 Art and Literature Unit 16 Science Unit 17 Stories of Human Life Unit 18 Entertainment Unit 19 Customs and Traditions Unit 20 History Stories and Legends Unit 21 Mysteries and Accidents Unit 22 Food Safety Unit 23 Tourist Attractions and Their Protections Unit 24 Social Studies Unit 25 Social Problems Unit 26 Wars and Conflicts Unit 27 Attitudes Towards Life Unit 28 The Internet and Cyber—Security 参考答案
