Unit One 1
Objectives 1
Teaching Process 2
Keys to the Exercises 15
参考译文 19
Unit Two 22
Objectives 22
Teaching Process 23
Keys to the Exercises 37
参考译文 42
Unit Three 45
Objectives 45
Teaching Process 46
Keys to the Exercises 65
参考译文 70
Unit Four 73
Objectives 73
Teaching Process 74
Keys to the Exercises 92
参考译文 97
Unit Five 100
Objectives 100
Teaching Process 101
Keys to the Exercises 120
参考译文 125
Unit Six 128
Objectives 128
Teaching Process 129
Keys to the Exercises 144
参考译文 149
Unit Seven 152
Objectives 152
Teaching Process 153
Keys to the Exercises 169
参考译文 174
Unit Eight 177
Objectives 177
Teaching Process 178
Keys to the Exercises 197
参考译文 202