Unit 1 Learning Strategies Unit 2 Royal Family Unit 3 Education Unit 4 Animals' Intelligence Unit 5 Moral Lessons Unit 6 A Tender Feeling Unit 7 Carelessness Unit 8 Dream Test Yourself(1) Unit 9 Functions of Laugh Unit 10 On Success Unit 11 Life Unit 12 Terrorism Unit 13 Culture Unit 14 Values Unit 15 Trust Unit 16 American Families Test Yourself(2) Unit 17 Study Habits Unit 18 Happiness Unit 19 Memory of Mother Unit 20 Mutual Gain Unit 21 Genetic Engineering Unit 22 Friends Unit 23 Neighbors Unit 24 Protection of Environment Test Yourself(3) Keys to Book One