Unit One Learning Is Good for You！ 1
Unit Two Australia 32
Unit Three Mass Tourism 52
Unit Four Body Language 73
Unit Five The Dangers of Smoking 101
Unit Six Beef Wars 123
Unit Seven Fire！ 145
Unit Eight Minimizing Stress 164
Unit Nine Who Owns Science？ 184
Unit Ten El Nino 204
Unit Eleven Can You Make Decisions？ 224
Unit Twelve Short Story 250
参考答案 268