Unit 1 Teachers Day 1
Unit 2 The sports meeting 11
Unit 3 A good teacher 22
Unit 4 What were they doing 34
Unit 5 The accident 45
Unit 6 In the library 54
Unit 7 Mainly revision 65
Unit 8 On the farm 76
Unit 9 A visit to a factory 87
Unit 10 Mr Green s problem 97
Unit 11 A great inventor 108
Unit 12 Have a good time, Jim! 118
Unit 13 Merry Christmas! 129
Unit 14 Mainly revision 142
Unit 15 At home with the twins 151
Unit 16 What s it made of？ 159
Unit 17 What was it used for？ 172
Unit 18 Planting trees 183
Unit 19 Mainly revision 193
Unit 20 The world s population 203
Unit 21 Shopping 210
Unit 22 At the doctors 220
Unit 23 The football match 231
Unit 24 Mainly revision 243
参考答案及解析 251