编者语 前言(1)写给老师 前言(2)写给同学 Unit1 The laser and light theme park Unit2 Health Unit3 How we communicate Unit4 The media Unit5 Films Unit6 Mainly Revision Unit7 Papua New Guinea Unit8 Medicine Unit9 Conversation Unit10 Shopping Unit11 Natural disaster Unit12 Mainly revision Unit13 International cooperation Unti14 Around the world Unit15 Crime&punishment …… · · · · · · (收起)