21世纪大学实用英语 综合练习 3PDF电子书下载

Unit 1 1

Part Ⅰ Text Exercises 1

Part Ⅱ Exercises for PRETCO 10

Unit 2 19

Part Ⅰ Text Exercises 19

Part Ⅱ Exercises for PRETCO 28

Unit 3 36

Part Ⅰ Text Exercises 36

Part Ⅱ Exercises for PRETCO 44

Unit 4 52

Part Ⅰ Text Exercises 52

Part Ⅱ Exercises for PRETCO 60

Test yourseef(for Units 1-4) 69

Unit 5 77

Part Ⅰ Text Exercises 77

Part Ⅱ Exercises for PRETCO 86

Unit 6 95

Part Ⅰ Text Exercises 95

Part Ⅱ Exercises for PRETCO 104

Unit 7 113

Part Ⅰ Text Exercises 113

Part Ⅱ Exercises for PRETCO 121

Unit 8 131

Part Ⅰ Text Exercises 131

Part Ⅱ Exercises for PRETCO 141

Test yourseef(for Units 5-8) 150

Test yourseef(for PRETCO—Level A) 159