Unit 1 Teachers Day 1
Unit 2 The sport meeting 12
Unit 3 A good teacher 25
Unit 4 What were you dong? 40
Unit 5 The accident 54
Unit 6 In the library 70
Unit 7 Mainly revision 82
Unit 8 On the farm 96
Unit 9 A visit to a factory 110
Unit 10 Mr Green s problem 124
Unit 11 A great inventor 137
Unit 12 Have a good time，Jim! 151
Unit 13 Merry Christmas 164
Unit 14 Mainly revision 176
Unit 15 At home with the twins 189
Unit 16 What s it made of? 204
Unit 17 What was it used for? 218
Unit 18 Planting trees 234
Unit 19 Mainly revision 248
Unit 20 The World s population 261
Unit 21 Shopping 272
Unit 22 At the doctor s 287
Unit 23 The football match 303
Unit 24 Mainly revision 316
答案与提示 333