出版說明 本書使用說明 Unit1 Animals Lesson1 The Kiwi Lesson2 The Camel Lesson3 The Polar Bear Lesson4 The Hippopotamus Lesson5 The Dolphin Word Study Extension Activities Video Highlights:CNN Video Dolphins in Honduras Activity Page Dictionary Page:Finding Antonyms Unit2 How?Why? Lesson1 Why Do We Yawn? Lesson2 Why Do People Laugh? Lesson3 Why Is the Sea Salty? Lesson4 How Can a Plant Kill? Lesson5 How Do Many Hearing-Impaired People Talk? Word Study Extension Activities Video Highlights:CNN Video A New Kind of Tourism in Braxzil Activity Page Dictionary Page:Learning Word Forms Unit3 Plants Lesson1 The Date Palm Lesson2 The Water Hyacinth Lesson3 Rice Lesson4 Oranges Lesson5 The Coffee Plant Word Study Extension Activities Video Highlights:CNN Video The Bakas of Comeroon Activity Page Dictionary Page:Finding the Correct Spelling Unit4 Music Lesson1 Music and Behavior Lesson2 Blues and Jazz Lesson3 Rock and Roll Lesson4 Country-Western Music Lesson5 Latin Music and Salsa Word Study Extension Activities Video Highlights:CNN Video The New Countrg Songwriters Activity Page Dictionary Page:Understanding Grammar Unit5 Word andLeisure Lesson1 Work Hours Lesson2 Salaries Lesson3 Family-Friendly Companies Lesson4 Work Clothes Lesson5 Tiem Off Word Study Extension Activities Video Highlights:CNN Video Volunteer Firefighters in Los Angeles Activity Page Dictionary Page:Learning Word Forms Unit6 Interesting People of the Word Lesson1 The Sami of Northern Europe Lesson2 The Ainu of Japan Lesson3 The Yanomami of the Amazon Lesson4 The Hopi of Arizona Lesson5 The Maori of New Zealand Word Study …… Unit7 Exploration and Adventure Unit Quiz Vocabulary Skills Index Irregular Verbs Video Transcripts