目录 Unit1 Education Unit2 Food Unit3 Health Unit4 Media Unit5 Practice 1 Unit6 Advertising Unit7 Learning to Speak Unit8 The Environment Unit9 Sponsorship Unit10 Practice 2 Unit11 Transport Unit12 Travel Unit13 Technology Unit14 Money Unit15 Practice 3 Unit16 Commodities Unit17 Social Issues Unit18 Drugs and Sport Unit19 Communication Unit20 Practice 4 Answer Key