Unit 1 In th library
Unit 2 Water sports
Unit 3 Make our world more beautiful!
Unit 4 Travel
Unit 5 Have a good time!
Unit 6 Mainly revision
Unit 7 A man who never gave up
Unit 8 Merry christmas!
Unit 9 What is it made of?
Unit 10 When was it built?
Unit 11 Planting trees
Unit 12 Mainly revision
Unit 13 The worlds population
Unit 14 Shopping
Unit 15 A doctor for animals
Unit 16 The football match
Unit 17 The missing necklace
Unit 18 Mainly rvision
附录一 课后习题参考答案
附录二 课文参考译文
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