Lesson One 1
Lesson Two 5
Lesson Three 9
Lesson Four 14
Lesson Five 18
Lesson Six 23
Lesson Seven 29
Lesson Eight 37
Lesson Nine 46
Lesson Ten 55
Lesson Eleven 64
Lesson Twelve （复习） 72
Lesson Thirteen 76
Lesson Fourteen 85
Lesson Fifteen 94
Lesson Sixteen 103
Lesson Seventeen 110
Lesson Eightee n 119
Lesson Nineteen （复习） 128
词汇表 132
补充阅读材料： 149
1. Grace and Joan 149
2. The Crow and the Fox 151
3. Tom and Mary 153