Unit16 What's your middle name?你的中名是什么?
Lesson 31
Lesson 32
Unit17 A cuckoo in the nest鸟窝中的布谷鸟
Lesson 33
Lesson 34
Unit18 Read the label!看标签!
Lesson 35
Lesson 36
Unit19 A problem with squirrels松鼠问题
Lesson 37
Lesson 38
Unit20 An ordinary life平凡的生活
Lesson 39
Lesson 40
Unit 21 The weather forecast天气预报
Lesson 41
Lesson 42
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