21世纪大学英语 综合练习 3 S版PDF电子书下载

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Unit 1 Career Competencies 1

Part Ⅰ Text Exercises 1

Part Ⅱ Exercises for CET-4 7

Unit 2 Sustainable Living 17

Part Ⅰ Text Exercises 17

Part Ⅱ Exercises for CET-4 22

Unit 3 Road to Success 33

Part Ⅰ Text Exercises 33

Part Ⅱ Exercises for CET-4 38

Unit 4 Space Technology 48

Part Ⅰ Text Exercises 48

Part Ⅱ Exercises for CET-4 53

Test yourself(for Units 1-4) 64

Unit 5 Travel 73

Part Ⅰ Text Exercises 73

Part Ⅱ Exercises for CET-4 78

Unit 6 Teaching 88

Part Ⅰ Text Exercises 88

Part Ⅱ Exercises for CET-4 93

Unit 7 Construction 104

Part Ⅰ Text Exercises 104

Part Ⅱ Exercises for CET-4 110

Unit 8 Code of Conduct 120

Part Ⅰ Text Exercises 120

Part Ⅱ Exercises for CET-4 126

Test yourself(for Units 5-8) 137

Test yourself(for CET-4) 146

Key and Script for Workbook(3) 157

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