Unit 1 Teacher's Day 1
Unit 2 The sports meeting 14
Unit 3 A good teacher 26
Unit 4 What were they doing? 38
Unit 5 The accident 50
Unit 6 In the library 62
Unit 7 Mainly revision 74
Unit 8 On the farm 84
Unit 9 A visit to a factory 98
Unit 10 MrGreen's problem 111
Unit 11 A great inventor 122
Unit 12 Have a good time,Jim! 135
Unit 13 Merry Christmas 146
Unit 14 Mainly revision 157
Unit 15 At home with the twins 170
Unit 16 What's it made of? 183
Unit 17 What was it used for? 195
Unit 18 Planting trees 207
Unit 19 Mainly revision 220
Unit 20 The world's population 232
Unit 21 Shopping 244
Unit 22 At the doctors 256
Unit 23 The football match 268
Unit 24 Mainly revision 281
期末测试题 293