第三册 3
Lesson One 3
Lesson Two 10
Lesson Three 16
Lesson Four 22
Lesson Five 29
Lesson Six 35
Lesson Seven 40
Lesson Eight（期中检测题） 47
Lesson Nine 55
Lesson Ten 62
Lesson Eleven 69
Lesson Twelve 76
Lesson Thirteen 82
Lesson Fourteen 88
Lesson Fifteen（期末检测题） 95
第四册 105
Lesson One 105
Lesson Two 112
Lesson Three 118
Lesson Four 124
Lesson Five 131
Lesson Six 138
Lesson Seven（期中检测题） 145
Lesson Eight 154
Lesson Nine 161
Lesson Ten 168
Lesson Eleven 175
Lesson Twelve 183
Lesson Thirteen 191
Lesson Fourteen（期末检测题） 198
参考答案 207