21世纪大学英语练习册 4PDF电子书下载

Unit 1 1

Part Ⅰ Exercises for Text A 1

Part Ⅱ Exercises for Text B 4

Part Ⅲ Reading Comprehension 5

Part Ⅳ Listening Comprehension 10

Unit 2 14

Part Ⅰ ExercisesforTextA 14

Part Ⅱ Exercises for Text B 18

Part Ⅲ Reading Comprehension 19

Part Ⅳ Listening Comprehension 24

Unit 3 28

Part Ⅰ Exercises for Text A 28

Part Ⅱ Exercises for Text B 31

Part Ⅲ Reading Comprehension 32

Part Ⅳ Listening Comprehension 37

Unit4 41

Part Ⅰ Exercises for Text A 41

Part Ⅱ Exercises for Text B 45

Part Ⅲ Reading Comprehension 46

Part Ⅳ Listening Comprehension 51

Unit 5 55

Part Ⅰ Exercises for Text A 55

Part Ⅱ Exercises for Text B 58

Part Ⅲ Reading Comprehension 59

Part Ⅳ Listening Comprehension 64

Unit 6 68

Part Ⅰ Exercises for Text A 68

Part Ⅱ Exercises for Text B 72

Part Ⅲ Reading Comprehension 74

Part Ⅳ Listening Comprehension 79

Unit 7 82

Part Ⅰ Exercises for Text A 82

Part Ⅱ Exercises for Text B 86

Part Ⅲ Reading Comprehension 87

Part Ⅳ Listening Comprehension 92

Unit 8 96

Part Ⅰ Exercises forTextA 96

Part Ⅱ Exercises for Text B 100

Part Ⅲ Reading Comprehension 102

Part Ⅳ Listening Comprehension 107

Key to Exercises 110

Appendix 135

Rate Graph 135

Comprehension Graph 136