包邮21世纪实用英语综合练习2 第3版

Unit 1 Career Peanning Part Ⅰ Text Exercises Part Ⅱ Exercises for PRETCO (Level A) Unit 2 Medical Innovations Part Ⅰ Text Exercises Part Ⅱ Exercises for PRETCO (Level A) Unit 3 Workplace Know-Hows Part Ⅰ Text Exercises Part Ⅱ Exercises for PRETCO (Level A) Test yourself (for Units 1-3) Unit 4 Tech Advances Part Ⅰ Text Exercises Part Ⅱ Exercises for PRETCO (Level A) Unit 5 Nothing is impossible Part Ⅰ Text Exercises Part Ⅱ Exercises for PRETCO (Level A) Unit 6 Keeping Close to Nature Part Ⅰ Text Exercises Part Ⅱ Exercises for PRETCO (Level A) Test yourself (for Units 4-6) Test yourself (for PRETCO - Level A) Key and Script