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课文目录与封面 Unit 1:Spring is coming! Lesson 1:How's the weather? Lesson 2:It's getting warmer! Lesson 3:The sun is rising Lesson 4:The spring city Lesson5:Babysitting on a Spring Day Lesson 6:Stories about spring Review:Unit Review Unit 2:Plant a plant! Lesson 7:Planting trees Lesson 8:Why are plants important? Lesson 9:Gardening with Mary Lesson 10:Make your garden grow! Lesson 11:Amazing plants Lesson 12:Danny's plant Review:Unit Review Unit 3:Animals are our friends Lesson 13:Danny's big scare Lesson 14:Amazing animals Lesson 15:The zoo is open Lesson 16:The bear escaped! Lesson 17:Save the tigers Lesson 18:Friendship between animals Review:Unit Review Unit 4:The internet connects us Lesson 19:How do you use the internet? Lesson 20:A computer helps! Lesson 21:Books or computers? Lesson 22:Travel on the internet Lesson 23:The internet - good or bad? Lesson 24:An E-mail to Grandpa Review:Unit Review Unit 5:Buying and selling Lesson 25:Raising money Lesson 26:Cookies,please! Lesson 27:Business English Lesson 28:Mr. Liu's great idea Lesson 29:How to push a product Lesson 30:A cookie sale Review:Unit Review Unit 6:Be a champion! Lesson 31:Don't fall,Danny! Lesson 32:My favourite record Lesson 33:2800 years of sports Lesson 34:Modern Olympics Lesson 35:The dream team Lesson 36:Classroom Olympics Review:Unit Review Unit 7:Know our world Lesson 37:Let's learn geography! Lesson 38:The world is a big place Lesson 39:Ring up or call? Lesson 40:Body language Lesson 41:A class of the world Lesson 42:North America Review:Unit Review Unit 8:Save our world Lesson 43:Let's clean up! Lesson 44:Environment clubs Lesson 45:Let's sort garbage! Lesson 46:Protect our environment Lesson 46:Connected to nature Lesson 48:Garbage is interesting! Review:Unit Review Pronunciation Vocabulary and Structures Grammar
