21世纪大学英语练习册 第4册PDF电子书下载

Part Ⅰ Exercises for Text A 1

ContentsUnit 1

Part Ⅱ Exercises for Text B 4

Part Ⅲ Reading Comprehension 6

Unit 2 11

Part Ⅰ Exercises for Text A 11

Part Ⅱ Exercises for Text B 15

Part Ⅲ Reading Comprehension 17

Part Ⅰ Exercises for Text A 22

Unit 3 22

Part Ⅱ Exercises for Text B 25

Part Ⅲ Reading Comprehension 26

Unit 4 32

Part Ⅰ Exercises for Text A 32

Part Ⅱ Exercises for Text B 36

Part Ⅲ Reading Comprehension 37

Part Ⅰ Exercises for Text A 43

Unit 5 43

Part Ⅱ Exercises for Text B 46

Part Ⅲ Reading Comprehension 48

Unit 6 53

Part Ⅰ Exercises for Text A 53

Part Ⅱ Exercises for Text B 57

Part Ⅲ Reading Comprehension 59

Unit 7 65

Part Ⅰ Exercises for Text A 65

Part Ⅱ Exercises for Text B 69

Part Ⅲ Reading Comprehension 71

Unit 8 76

Part Ⅰ Exercises for Text A 76

Part Ⅱ Exercises for Text B 81

Part Ⅲ Reading Comprehension 82

Part Ⅰ 88

Key to ExercisesUnit 1 88

Part Ⅱ 89

Part Ⅲ 90

Unit 2 91

Part Ⅰ 91

Part Ⅱ 92

Part Ⅲ 93

Unit 3 94

Part Ⅰ 94

Part Ⅱ 95

Part Ⅲ 95

Unit 4 97

Part Ⅰ 97

Part Ⅱ 98

Part Ⅲ 99

Part Ⅰ 100

Unit 5 100

Part Ⅱ 101

Part Ⅲ 102

Unit 6 103

Part Ⅰ 103

Part Ⅱ 104

Part Ⅲ 105

Part Ⅰ 106

Unit 7 106

Part Ⅱ 107

Part Ⅲ 107

Unit 8 109

Part Ⅰ 109

Part Ⅱ 110

Part Ⅲ 111

AppendixRate Graph 112

Comprehension Graph 113