目录
Lesson One A Good Way To Make Friends(免费使用)
Lesson Two The Golden Touch
Lesson Three How Light Travels
Lesson Four Alexander Bell's Greatest Invention
Lesson Five Election in the United States
Lesson Six Three against One
Lesson Seven First Aid
Lesson Eight Food Revolution
Lesson Nine Wives of Smokers Face Lung Cancer Risks
Lesson Ten The Talking Machine
Lesson Eleven Color Association
Lesson Twelve A Thirsty World
Lesson Thirteen The Information Superhighway
Lesson Fourteen Britain
Lesson Fifteen Christopher Columbus
Lesson Sixteen Some Problems Facing Learners of English
Lesson Seventeen Test-Tube Babies
Lesson Eighteen Planning And People
Lesson Nineteen Telling The Time
Lesson Twenty Several Planets in the Solar System
Lesson Twenty-One A Hat and a Goose
Lesson Twenty-Two The Grateful Crane
Lesson Twenty-Three A New World
Lesson Twenty-Four The Strange Armies from the Sky
Lesson Twenty-Five The Future of Society
Lesson Twenty-Six The Sampler
Lesson Twenty-Seven Prophet of the Space Age
Lesson Twenty-Eight Does Travel Broaden the Mind?
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