编者语
Introduction to the Teacher
Introduction to the Student
Unit 1 Welcome back!
Unit 2 Expedition
Unit 3 Learning English
Unit 4 Travelling
Unit 5 On the farm
Unit 6 Cars, boats and houses
Unit 7 Volcanoes and earthquakes
Unit 8 Food
Unit 9 Emails and computers
Unit 10 Sports
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Answer Key
List of New Words
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