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4.1 Unit 1 Getting to places
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4.2 Unit 2 Dealing with people
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4.2.1 I. Social events
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4.2.2 IIA. Pleasant situations
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4.2.3 IIB. Unpleasant situations
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4.2.4 III. Upon leaving: gifts, speeches and toasts
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4.2.5 单元知识总结
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4.3 Unit 3 House and home
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4.4 Unit 4 Education
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4.5 Unit 5 Animals
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4.5.1 I. Defining and classifying animals
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4.5.2 II. Comparing animals
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4.5.3 IIIA. Animal rights
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4.5.4 单元测试
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4.6 Unit 6 Holiday and celebrations
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4.7 Food and drink