Unit 1 Teachers' Day 1
Unit 2 The sports meeting 6
Unit 3 A good teacher 12
Unit 4 What were they doing? 17
1—4单元专项练习 23
Unit 5 The accident 30
Unit 6 In the library 35
Unit 7 Mainly revision 41
Unit 8 On the farm 46
5—8单元专项练习 52
Unit 9 A visit to a factory 59
Unit 10 Mr Green's problem 64
Unit 11 A great inventor 70
9—11单元专项练习 74
Unit 12 Have a good time, Jim！ 81
Unit 13 Merry Christmas！ 86
Unit 14 Mainly revision 92
12—14单元专项练习 98
Answers to all the exercises（参考答案） 104