目录 Unit1 生活知识 1 Buy Things at a Supermarket 2 At the Zoo 3 Watching TV 4 That's a Problem 5 Books On “How to…” Unit2 科学知识 1 Air 2 It's a Shadow 3 Light and Shadow 4 Trains 5 Man's Brain Unit3 生物知识 1 Kangaroos 2 Strong Ants 3 A Crow Drinks Water 4 Owls 5 Can Animals Be Made to Work for Us? Unit4 气候知识 1 The Sun and the Moon 2 Four Seasons 3 The Weather in England 4 The Worst Storm 5 Water Unit5 旅游知识 1 The Leaning Tower of Pisa 2 Language Problems in a Foreign Country 3 Get Ready for Hiking 4 Welcome to Guilin 5 A Great Vacation Unit6 语言知识 1 A French Student 2 Guess a New Word 3 How to Learn Chinese in US Schools? 4 What's a White Lie? 5 How to Make Your Vocabulary Bigger? Unit7 节日风俗 1 The Halloween 2 Christmas Eve 3 The Spring Festival 4 Christmas Day 5 Lucky Numbers Unit8 地理知识 1 The Sea 2 The USA 3 Australia 4 The North of Canada 答案
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