21世纪大学实用英语 综合练习 4 U版PDF电子书下载

Unit 1 1

Part Ⅰ Text Exercises 1

Part Ⅱ Exercises for CET-4 9

Unit 2 24

Part Ⅰ Text Exercises 24

Part Ⅱ Exercises for CET-4 31

Unit 3 45

Part Ⅰ Text Exercises 45

Part Ⅱ Exercises for CET-4 52

Unit 4 67

Part Ⅰ Text Exercises 67

Part Ⅱ Exercises for CET-4 75

Test yourseef（for Units 1-4） 89

Unit 5 97

Part Ⅰ Text Exercises 97

Part Ⅱ Exercises for CET-4 105

Unit 6 120

Part Ⅰ Text Exercises 120

Part Ⅱ Exercises for CET-4 127

Unit 7 140

Part Ⅰ Text Exercises 140

Part Ⅱ Exercises for CET-4 148

Unit 8 161

Part Ⅰ Text Exercises 161

Part Ⅱ Exercises for CET-4 168

Test yourseef（for Units 5-8） 182

Test yourseef（for CET-4） 190