Unit1 In the library 1
Unit2 Water sports 14
Unit3 Make our world more beautiful! 27
Unit4 Travel 36
Unit5 Have a good time! 48
Unit6 Mainly revision 59
Unit7 A man who never gave up 71
Unit8 Merry Christmas 84
Unit9 What is it made of? 94
Unit10 When was it built? 105
Unit11 Planting trees 115
Unit12 Mainly revision 129
Unit13 The world s population 140
Unit14 Shopping 153
Unit15 A doctor for animals 165
Unit16 The football match 174
Unit17 The missing necklace 184
Unit18 Mainly revision 195
参考答案 205