CONTENTS 1
Unit 1 In the library 1
Unit 2 Water sports 8
Unit 3 Make our world more beautiful！ 19
Unit 4 Travel 27
Unit 5 Have a good time！ 33
Unit 6 Mainly revision 42
Unit 7 A man who nevergave up 57
Unit 8 Merry Christmas！ 69
Unit 9 What is it made of？ 82
Unit 10 Whenwas it built？ 90
Unit 11 Planting trees 99
Unit 12 Mainly revision 110
Unit 13 The world’s population 118
Unit 14 Shopping 130
Unit 15 A doctor for animals 143
Unit 16 The football match 157
Unit 17 The missing necklace 169
Unit 18 Mainly revision 177