Unit One 1
Objectives 1
Teaching Process 2
Key to the Exercises 11
参考译文 15
Unit Two 19
Objectives 19
Teaching Process 20
Key to the Exercises 28
参考译文 32
Unit Three 37
Objectives 37
Teaching Process 38
Key to the Exercises 46
参考译文 49
Unit Four 53
Objectives 53
Teaching Process 54
Key to the Exercises 65
参考译文 68
Unit Five 72
Objectives 72
Teaching Process 73
Key to the Exercises 86
参考译文 90
Unit Six 94
Objectives 94
Teaching Process 95
Key to the Exercises 103
参考译文 107
Unit Seven 111
Objectives 111
Teaching Process 112
Key to the Exercises 120
参考译文 124
Unit Eight 127
Objectives 127
Teaching Process 128
Key to the Exercises 139
参考译文 143