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• Structure 加入 10:07
• Vocabulary
• Vocabulary 加入 13:08
• Sentence patterns
• Sentence Patterns 加入 11:31
• Difficult sentences
• Difficult sentences 加入 06:22
• Sentence translation
• Sentence translation 加入 09:00
• Unit 7 History and personality
• Background
• Background 加入 10:36
• Structure
• Structure 加入 20:20
• Vocabulary
• Vocabulary 加入 08:22
• Sentence patterns
• Sentence patterns 加入 09:45
• Difficult sentences
• Difficult sentences 加入 06:10
• Sentence translation
• Sentence translation 加入 12:11
• Unit 8 Technology and future
• Background