导读
Unit 1 Food
Unit 2 Sport
Unit 3 Medicine
Unit 4 Custom
Unit 5 Education
Unit 6 Geography and Astronomy
Unit 7 Climate
Unit 8 Aduertisement
Unit 9 Children
Unit 10 Computer and Internet
Unit 11 History
Unit 12 Manners
Unit 13 Business
Unit 14 Science
参考答案与试题分析