前言 Unit 1 Physical Education Unit 2 Traveling Unit 3 ASEAN Unit 4 The World We’re Living In Unit 5 Marriage and Family Unit 6 Communication and Transportation Unit 7 Environment — Global Warming or Global Cooling? Unit 8 Education Unit 9 Economy Unit 10 Languages We Live By Unit 11 Health Problems Unit 12 Chinese Culture Unit 13 Religions in Western Cultures Unit 14 Computers and the Internet Unit 15 Ethnic Peoples and Their Cultures Unit 16 Agriculture Unit 17 Literature Unit 18 Arts Unit 19 Law and Lawsuits Unit 20 Philosophy and Its Postmodern Variants