Lesson One Man and Animals Lesson Two Travelling with "Queen" Lesson Three Myths and Fossil Hunting Lesson Four Photography Lesson Five Modern Toys Lesson Six Adventures on the Icefall Lesson Seven Travel Schooling Lesson Eight Our Earliest Ancestors Lesson Nine How Money Began Lesson Ten Blessings from Nature Lesson Eleven Modern Technologies Lesson Twelve The Wonder of Language Lesson Thirteen Adventures in Roraima Lesson Fourteen The Sinking of Titanic Lesson Fifteen Child Labour Lesson Sixteen Bullying Lesson Seventeen Mission Lesson Eighteen Blessed Piracies Lesson Nineteen Disastrous Damage to Oceans Lesson Twenty Road Accidents Lesson Twenty-one Teaching in China Lesson Twenty-two Drawbacks of Social Progress Lesson Twenty-three Pleasure of Diving Lesson Twenty-four Hurricanes Lesson Twenty-five The Age of Bacteria Lesson Twenty-six Migration Lesson Twenty-seven Insomnia Lesson Twenty-eight Robbery 参考文献
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