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内容简介
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目录
Unit 1 It's a Small World
;Chapter 1 My Hometown
Chapter 2 Countries
Chapter Famous Cities
;Unit 2 Going on a Trip
Chapter 4 Planning for a Trip
Chapter 5 At the Train Station
Chapter A Trip to Xi'an
;Unit 3 Our World
;Chapter 7 Land and Sea
Chapter 8 Nature Walk
Chapter 9 Earth Day
;Unit 4 Animal Kingdom
;Chapter 10 Wild Animals
Chapter 11 The Food Chain
Chapter 12 At the Zoo
;Writing
;Answer Key