Unit 1 In the Library 1
Unit 2 Water Sports 16
Unit 3 Make our World More Beautiful 31
Unit 4 Travel 46
Unit 5 Have a Good Time 59
Unit 6 Mainly Revision 75
Unit 7 A Man Who Never Gave Up 90
Unit 8 Marry Christmas! 107
Unit 9 What is it Made of? 125
Unit 10 When was it Built? 142
Unit 11 Planting Trees 158
Unit 12 Mainly Revision 173
Unit 13 The World s Population 192
Unit 14 Shopping 206
Unit 15 A Doctor for Animals 224
Unit 16 The Football Match 242
Unit 17 The Missing Necklace 257
Unit 18 Mainly Revision 272
期末考试 287
参考答案 295