21世纪大学英语 练习册 第4册PDF电子书下载

Unit One 1

Part Ⅰ Exe rcises for Text A 1

Part Ⅱ Exercises for Text B 5

Part Ⅲ Reading Comprehension 7

Unit Two 15

Part Ⅰ Exercises for Text A 15

Part Ⅱ Exercises for Text B 21

Part Ⅲ Reading Comprehension 23

Unit Three 29

Part Ⅰ Exercises for Text A 29

Part Ⅱ Exercises for Text B 33

Part Ⅲ Reading Comprehension 35

Unit Four 42

Part Ⅰ Exercises for Text A 42

Part Ⅱ Exercises for Text B 48

Part Ⅲ Reading Comprehension 50

Unit Five 57

Part Ⅰ Exercises for Text A 57

Part Ⅱ Exercises for Text B 61

Part Ⅲ Reading Comprehension 63

Part Ⅰ Exercises for Text A 70

Unit Six 70

Part Ⅱ Exercises for Text B 76

Part Ⅲ Reading Comprehension 78

Unit Seven 86

Part Ⅰ Exercises for Text A 86

Part Ⅱ Exercises for Text B 90

Part Ⅲ Reading Comprehension 93

Unit Eight 100

Part Ⅰ Exercises for Text A 100

Part Ⅱ Exercises for Text B 106

Part Ⅲ Reading Comprehension 108

Unit Nine 115

Part Ⅰ Exercises for Text A 115

Part Ⅱ Exercises for Text B 120

Part Ⅲ Reading Comprehension 122

Unit Ten 129

Part Ⅰ Exercises for Text A 129

Part Ⅱ Exercises for Text B 135

Part Ⅲ Reading Comprehension 137

Part Ⅰ 145

Unit One 145

Key to Exercises 145

Part Ⅱ 147

Part Ⅲ 147

Unit Two 149

Part Ⅰ 149

Part Ⅱ 151

Part Ⅲ 151

Unit Three 153

Part Ⅰ 153

Part Ⅱ 154

Part Ⅲ 155

Unit Four 156

Part Ⅰ 156

Part Ⅱ 158

Part Ⅲ 158

Unit Five 160

Part Ⅰ 160

Part Ⅱ 162

Part Ⅲ 162

Part Ⅰ 164

Unit Six 164

Part Ⅱ 166

Part Ⅲ 167

Unit Seven 168

Part Ⅰ 168

Part Ⅱ 169

Part Ⅲ 170

Unit Eight 171

Part Ⅰ 171

Part Ⅱ 172

Part Ⅲ 173

Unit Nine 174

Part Ⅰ 174

Part Ⅱ 175

Part Ⅲ 176

Unit Ten 177

Part Ⅰ 177

Part Ⅱ 178

Part Ⅲ 179

Appendix 181

Rate Graph 181

Comprehension Graph 182