Lesson 1 1
Lesson 2 18
Lesson 3 33
Lesson 4 50
Lesson 5 66
Lesson 6 82
Review Exercises（Lessons 1—6） 100
Lesson 7 106
Lesson 8 122
Lesson 9 139
Lesson 10 154
Review Exercises（Lessons 7—10） 169
Lesson 11 174
Lesson 12 189
Lesson 13 205
Lesson 14 220
Lesson 15 235
Review Exercises (Lesson 11—15) 251
Appendix Ⅰ Exercise Directions 256
Appendix Ⅱ A List of Irregular Verbs 259
Appendix Ⅲ Phrases and Expressions 261
Appendix Ⅳ Vocabulary 171