Lesson 1 1
Lesson 2 13
Lesson 3 28
Lesson 4 42
Lesson 5 56
Lesson 6 72
Lesson 7 88
Lesson 8 105
Revision Ⅱ 121
Lesson 9 129
Lesson 10 144
Lesson 11 157
Lesson 12 170
Lesson 13 184
Lesson 14 200
Lesson 15 218
Lesson 16 231
Word Study：turn，worry 244
Revision II 244
Vocabulary List 252