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• Structure
• Structure 加入 14:24
• Vocabulary
• Vocabulary 加入 25:14
• Sentence patterns
• Sentence patterns 加入 05:40
• Difficult sentences
• Difficult sentences 加入 12:58
• Sentence translation
• Sentence translation 加入 12:52
• Unit 3 Social science
• Lead in
• Lead in 加入 07:28
• Structure
• Sentence patterns 加入 08:41
• Vocabulary
• Vocabulary 加入 06:36
• Sentence patterns
• Sentence patterns 加入 08:41
• Difficult sentences
• Difficult sentences 加入 06:05
• Sentence translation
• Sentence translation 加入 08:02
• Unit 4 Health promotion