| Lesson One A Good Way to Make Friends Lesson Two Valentine's Day Lesson Three High Platform Shoes Lesson Four The Easy Way to Learn English Lesson Five Population Movement Lesson Six Reading the Right Books Lesson Seven Technical Advances and Social Problems Lesson Eight Let Children Learn by Themselves Lesson Nine Working Body Lesson Ten Population Control Lesson Eleven Smoking and Health Lesson Twelve The 5R Policy Lesson Thirteen Cherish Your Life Lesson Fourteen Women's Roles Lesson Fifteen Chatrooms Lesson Sixteen Advertisements Lesson Seventeen The First Intemet Worm——Morris Worm Lesson Eighteen Zheng He and Columbus Lesson Nineteen How Light Travels Lesson Twenty Alexander Bell's Greatest Invention |
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