CONTENTS Unit 1 Teachers' Day 2 The sports meeting 3 A good teacher 4 What were they doing? 5 The accident 6 In the library 7 Mainly revision 8 On the farm 9 A visit to a factory 10 Mr Green's problem 11 A great inventor 12 Have a good time,Jim! 13 Merry Christmas! 14 Mainly revision 15 At home with the twins 16 What's it made of? 17 What was it used for? 18 Planting trees 19 Mainly revision 20 The world's population 21 Shopping 22 At the doctor's 23 The football match 24 Mainly revision 短语词组总复习 常用不规则动词表 · · · · · · (收起)