2016秋人教精通版英语六上Unit 6《There are four seasons in a year》（Lesson 34）
- A - Lesson 34 - Unit 6 There are four seasons in a year. - A
2016秋人教精通版英语六上Unit 6《There are four seasons in a year》（Lesson 34）2016秋人教精通版英语六上Unit 6《There are four seasons in a year》（Lesson 34）