Unit 1 In the library 1
Unit 2 Water sports 9
Unit 3 Make our world nore beautiful! 17
Unit 4 Travel 26
Unit 5 Have a good time! 33
Unit 6 Mainly revision 43
Unit 7 A man who never give up 52
Unit 8 Merry Christmas! 59
Unit 9 What is it made of? 66
期中测试题 73
Unit 10 When was it built? 81
Unit 11 Planting trees 90
Unit 12 Mainly revision 98
Unit 13 The world's population 106
Unit 14 Shopping 112
Unit 15 A doctor for animals 120
Unit 16 The football match 129
Unit 17 The missing necklace 138
Unit 18 Mainly revision 147
期末测试题（Ⅰ） 156
期末测试题（Ⅱ） 164