Unit 1 Knowing me, Knowing you

封面/前言/目录 Unit 1 Knowing me, Knowing you Unit 2 Making a difference Unit 3 The world of science Unit 4 Amazing art Unit 5 What an adventure! Unit 6 Disaster and hope Project Appendices Communicatlon bank Learning aid Words and expressions Vocabulary Names and places Review of everyday communication(Book1-Book3) Irregular verbs(不规则动词表) 后记/封底