Unit 1 In the library 1
Unit 2 Water sports 7
Unit 3 Make our world more beautiful! 13
Unit 4 Travel 20
Unit 5 Have a good time! 26
Unit 6 Mainly revision 32
Unit 7 A man who never gave up 38
Unit 8 Merry Christmas! 43
Unit 9 What is it made of? 49
Unit 10 When was it built? 55
Unit 11 Planting trees 62
Unit 12 Mainly revision 68
Unit 13 The world s population 75
Unit 14 Shopping 82
Unit 15 A doctor for animals 89
Unit 16 The football match 97
Unit 17 The missing necklace 104
Unit 18 Mainly revision 111
参考答案 118