Unit 1 Patriotism Part I Lead-in Part II Passsage A Part III Passage BUnit 2 Optimism Part I Lead-in Part II Passsage A Part III Passage BUnit 3 Harmony Part I Lead-in Part II Passsage A Part III Passage BUnit 4 Teamwork Part I Lead-in Part II Passsage A Part III Passage BUnit 5 Innovation Part I Lead-in Part II Passsage A Part III Passage BUnit 6 Perseverance Part I Lead-in Part II Passsage A Part III Passage BKeys to the Exercises 作者介绍
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