CONTENTS 1
Lesson One 1
Lesson Two 36
Lesson Three 54
Lesson Four 75
Lesson Five 94
Lesson Six（Revision One） 113
Key to Exercises 125
Vocabulary 162
CONTENTS 179
Lesson Seven 179
Lesson Eight 208
Lesson Nine 232
Lesson Ten 257
Lesson Eleven 299
Lesson Twelve（Revision Two） 327
Key to Exercises 338
Vocabulary 373