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Lesson 4. Wisdom of Bear Wood. Book 3. 创作单位:北京交通大学 主审: 郭海云 Louis Wang 主编: 赵新 王建荣 本单元作者: 王建荣. Michael Welzenbach. Lesson 4. Part One: Warm-up Part Two: Background Information Part Three: Text Appreciation Part Four: Language Study Part Five: Extension. Book 3.
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