出版说明 本书使用说明 Unit1 Inventions and Inventors Lesson1 The Zipper Lesson2 The Postage Stamp Lesson3 Pencils and Pens Lesson4 The Umbrella Lesson5 The Metric System Word Study Extension Activities Video Highlights:CNN Video,An International Stamp-Making Company Activity Page Dictionary Page:Fingding Antonyms Unit2 Sports Lesson1 Thai Boxing Lesson2 Sumo Wrestling Lesson3 Tarahumara Foot Races Lesson4 Olympic Sports Lesson5 Greatathletes Word Study Extension Activities Video Highlights:CNN Video,Scrabble-More Than a Came Activity Page Dictionary Page:Stress and Pronunciation Unit3 Food Lesson1 The Puffer Fish Lesson2 Foods from Around the World Lesson3 Chocolate Lesson4 The Blue Revolution Lesson5 Twenty-One Days Without Food …… Unit4 Mysteries Unit5 Business Unit Quiz Vocabulary Skills Index Irregular Verbs Video Transcripts
