21世纪大学实用英语（全新版）综合练习 1PDF电子书下载

Unit 1 1

Part Ⅰ Text Exercises 1

Part Ⅱ Exercises for PRETCO 7

Unit 2 15

Part Ⅰ Text Exercises 15

Part Ⅱ Exercises for PRETCO 20

Unit 3 29

Part Ⅰ Text Exercises 29

Part Ⅱ Exercises for PRETCO 35

Unit 4 43

Part Ⅰ Text Exercises 43

Part Ⅱ Exercises for PRETCO 49

Test yourself(for Units 1-4) 58

Unit 5 65

Part Ⅰ Text Exercises 65

Part Ⅱ Exercises for PRETCO 70

Unit 6 79

Part Ⅰ Text Exercises 79

Part Ⅱ Exercises for PRETCO 85

Unit 7 94

Part Ⅰ Text Exercises 94

Part Ⅱ Exercises for PRETCO 100

Unit 8 108

Part Ⅰ Text Exercises 108

Part Ⅱ Exercises for PRETCO 114

Test yourself(for Units 5-8) 123

Testyourself(for PRETCO—Level B) 131