Unit 1 In the library 1
Unit 2 Water sports 6
Unit 3 Make our world more beautiful! 13
Unit 4 Travel 19
Unit 5 Have a good time! 26
Unit 6 Mainly revision 32
期中测试题 38
Unit 7 A man who never gave up 46
Unit 8 Merry Christmas! 52
Unit 9 What is it made of? 57
Unit 10 When was it built? 63
Unit 11 Planting trees 69
Unit 12 Mainly revision 74
期末测试题 80
参考答案 88