如何使用本书
Cultures and Customs
Unit 1 Groundhog Day土拨鼠日
Unit 2 Ramadan斋月
Animals and Plants
Unit 3 Trees树
Unit 4 Shells贝壳
General Knowledge
Unit 5 Human Beings人类
Unit 6 Units of Measurement计量单位
Language and Literature
Unit 7 Novels小说
Unit 8 The Knights of the Round Table圆桌骑士
Science
Unit 9 Genes and DNA基因和DNA
Unit 10 The Solar System太阳系
Famous People and Events
Sports and Art
Media and Technology
The Earth and the Environment
History
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