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註釋v.1. Textbook , character book, teacher's book, exercise book, 3 sound discs. -- v.2. Textbook , character book, teacher's book, exercise book, 3 sound discs. -- v.3. Textbook, teacher's book, exercise book, 3 sound discs.-- v.4. Textbook, teacher's book, exercise book, 3 sound discs.