Unit2Peopleonthemove●GrammarandUsageStep1:GeneralintroductionThegrammaritemsinthisunitfocusononeaspectofthestructureofanarticle—...
Unit2Peopleonthemove●Grammarandusage1.Notallparagraphshaveatopicsentence.（P24）并不是所有的段落都有中心句。英语中的部分否定（即...
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