main Unit 1 Our Earth Unit 2 Technology Today Unit 3 Newspapers and the News Unit 4 The World of Work Unit 5 Big Business Unit 6 Wealth Unit 7 Social Issues Unit 8 Honestly Speaking 新世纪大学英语（第二版） 视听说教程（3rd Edition）电子教案unit An English Video Course 4 视听说教程（3rd Edition）电子教案 4 Unit 1 Our Earth An English Video Course 4 视听说教程（3rd Edition）电子教案 4 Unit 1 Our Earth In the neighborhood Vocabulary Link LA_VL_A1 A 1. cave / cavern 2. desert 3. coastline 4. harbor 5. hot springs 6. mountain range 7. cliff 8.
