Unit 1 Street Trees Unit 2 The Quest for Extraterrestrial Intelligence Unit 3 The Library Card Unit 4 How Could Anything That Feels So Bad Be So Good? Unit 5 The Monster Unit 6 Zeritsky's Law Unit 7 Look for the Rusty Lining Unit 8 Debating the Unknowable Appendix 1 Key to Exercises (Unit 1 - Unit 8) Appendix 2 Chinese Translations of the Texts (Unit 1 - Unit 8) Appendix 3 Chinese Translations of the Reading Passages (Unit I - Unit 8)