Lesson One 1
CONTENTS 1
Lesson Two 34
Lesson Three 65
Lesson Four 87
Lesson Five 116
Lesson Six（Revision One） 137
Vocabulary 149
Lesson Seven 187
CONTENTS 187
Lesson Eight 219
Lesson Nine 248
Lesson Ten 273
Lesson Eleven 295
Lesson Twelve（Revision Two） 319
Vocabulary 329
Appendix：Key to Exercises 360