Lesson One
Part Ⅰ First People in the Americas
Part Ⅱ American Indians
Part Ⅲ Improving Listening Comprehension
Lesson Two
Part Ⅰ Martin Luther King Jr
Part Ⅱ Your John Hancock
Part Ⅲ Improving Listening Comprehension
Lesson Three
Part Ⅰ All Fools Day
Part Ⅱ The Origin of the Word "Hello"
Part Ⅲ Improving Listening Comprehension
Lesson Four
Part Ⅰ Labour Day
Part Ⅱ Vaseline
Part Ⅲ Improving Listening Comprehension
Lesson Five
Part Ⅰ Saturday Night in the U，S. （Ⅰ）
Part Ⅱ Saturday Night in the U.S. （Ⅱ）
Part Ⅲ Improving Listening Comprehension
Lesson Six
Part Ⅰ EI Nino and La Nina
Part Ⅱ Lame Duck
Part Ⅲ Improving Listening Comprehension
Lesson Seven
Part Ⅰ Atmospheric Conditions in Antarctica
Part Ⅱ t Ax to Grind
Part Ⅲ Improving Listening Comprehension
Lesson Eight
Part Ⅰ Chinese Giant Pandas （Ⅰ）
Part Ⅱ Chinese Giant Pandas （Ⅱ）
Part Ⅲ Imroving Listening Comprehension
Lesson Nine
Part Ⅰ Indonesian Komodo Dragons
Part Ⅱ The Cat
Part Ⅲ Improving Listening Comprehension
Lesson Ten
Part Ⅰ The Universal Employment Agency
Part Ⅱ Muckraker
Part Ⅲ Improving Listening Comprehension
Lesson Eleven
Part Ⅰ Permanent Artificial Hearts
Part Ⅱ Heart and Its Phrases
Part Ⅲ Improving Listening Comprehension
Lesson Twelve
Part Ⅰ Respiratory Infections
Part Ⅱ From the Eye
Part Ⅲ Improving Listening Comprehension
Lesson Thirteen
Part Ⅰ AIDS and Tuberculosis in Asia （Ⅰ）
Part Ⅱ AIDS and Tuberculosis in Asia （Ⅱ）
Part Ⅲ Improving Listening Comprehension
Lesson Fourteen
Part Ⅰ Children and Competition
Part Ⅱ Bunk
Part Ⅲ Improving Listening Comprehension
Lesson Fifteen
Part Ⅰ Child-Care in the United States
Part Ⅱ White-Haired Boy
Part Ⅲ Improving Listening Comprehension
Lesson Sixteen
Part Ⅰ The Westinghouse Science Talent Search
Part Ⅱ American Childrens Favourite——Sneakers
Part Ⅲ Improving Listening Comprehension
Lesson Seventeen
Part Ⅰ Laser Light
Part Ⅱ Hand and Its Phrases
Part Ⅲ Improving Listening Comprehension
Lesson Eighteen
Part Ⅰ Shoplifter
Part Ⅱ Dog and Its Phrases
Part Ⅲ Improving Listening Comprehension
Tapescript
Answer Key
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