Unit 15 Healthy eating
Unit 16 Fire!
Unit 17 Nature
Unit 18 The necklace
Unit 19 Jobs
Unit 20 Mainly revision
期中模拟试卷
Unit 21 Karl Marx
Unit 22 Britain and Ireland
Unit 23 Rescuing the temple
Unit 24 The Science of farming
Unit 25 At the conference
Unit 26 Mainly revision
期末模拟试卷
参考答案
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