Unit 1
  Intelligence
  Is the Octopus a Human Killer？
  Honeybee's Life in a Colony
  How to Grow Old？
  Are Moral Standards Declining？
  The Meanings of Residential Mobility
  The Finger of Suspicion
  The Study of Liberal Arts
  Who Are Susceptible to Colds？
  The Varieties of American Newspapers
Unit 2
  Are Camels Obedient Beasts of Burden？
  Sunlight
  The Power of Voice
  Energy
  Earthquake
  How to Train Your Dogs？
  A Woman Writer
  Psychology and Consumer
  Top Earning Wives and Their Marriages
  Crimes
Unit 3
  Life in the Future
  Health-Related Behaviors
  The First Subway
  Heroes
  Neanderthals
  High-tech Communications
  Organ Transplant
  Reading
  Population and Food
  Sport
Unit 4
  Pay Structure
  Social Status
  Social Factors and Music Prodigies
  Standard English
  Insurance
  Earthquake Prediction
  Clouds
  Libraries
  Caution with Concrete
  Liquid and Gas
Unit 5
  Libraries in Metropolitan Areas
  Accidents and Human Behavior
  A Refused Letter
  Rock Music
  Treatment of Bedtime Tantrums
  Population
  School Phobia
  Individual, Group and Crowd
  Gestures
  Turkey——The Symbol of America？
Unit 6
  The Effect of Noise Pollution
  Objects in Space
  Scientific Explanation
  Courses in University
  Trees
  Braille
  Can Clothes Reveal Ourselves？
  How to Stay Young
  Stradivari's Violins
  Thinking and Feeling
Unit 7
  Hunting and Sporting Activities
  Tourism
  The Prolonged Life
  Greenpeace
  A New Transformation of Hospitals
  A Significant Economic Issue——Inflation
  The Basic Economic Systems
  What Attracts One to Another
  A New Way to Keep Food Fresh
  The Search for a Vaccine Against Malaria
Unit 8
  The Effect of Air Pollution
  Adaptation of Living Things
  Many Divisions of Physics.
  Competition in America
  Fallacies about Food
  Appropriate Technology
  Birds and Planes
  How to Do Exercise
  Intelligence and Environment
  The Selection of English Teachers
Unit 9
  Olympic Sponsors
  How to Seek and Save Employees
  Believe Evidence or Not
  Mr. and Mrs. Lester
  Language and Culture
  The Private Ownership of Hydrogen Bombs
  Noise and Health
  Virus Blockers
  G and PG Movies
  Gallup Extreme Magic
Unit 10
  Culture Differences
  Parental Influence in Education
  Teaching and Research
  Stereotypes
  Opportunities and Concentration
  Stokoe and Sign Language
  Language and Brain Development
  Real Beauty
  Elite Pool
  Tips on Public Speaking
Unit 11
  Proteins in a Balanced Diet
  Teachers and Pupils' Attitudes
  Women's Well-Being
  Beauty
  Violence in American Families
  Glass
  Media Impact
  Adolescence
  Preparations for Job Interviews
  Animal Experiments
Unit 12
  What Is Nourishing to Eat？
  Sex Prejudice
  New Life for the Handicapped
  Three English Dictionaries
  Patent
  Credit Terms in Transactions
  Survival in Desert
  Eyes——Windows of the Soul
  Poverty  i
  Animal Agriculture
Unit 13
  Bright or Not-So-Bright
  Computer Crimes
  Getting an Education
  The Computer and the Law
  Education——Global Enterprise
  Hi-tech in Developing Countries
  The Age of the Internet
  Old Love, Old Tunes
  Television
  Mars Exploration
Unit 14
  British Free Education Is at Risk
  Culture Activities
  On Intelligent People
  Dialect and Language
  New Life of Clinton
  The Curse on TV
  Bits
  Arranged Marriages in india
  The Golden Mean （PHI）
  The Antler Riddle
Unit 15
  Music-Culture
  The Internet's New Application
  Worrying Trend of Reading Ability
  How to Make Better Use of Humor
  Influence on Children's Personality
  Useless Generosity
  Challenging Medical Treatment
  Access to the Int6rnet
  Culture Shock
  An Analysis before Iraq War
Unit 16
  New Eating Trend
  Britain's Food Production
  Accountability
  The Theory of Losing Weight
  Global Climate Will Keep Changing
  The Oil Price Change Analysis
  Experiment on Chimpanzees
  The Solution to the Problems in INS
  Growing Older
  The Development of Information Carrier
Unit 17
  Wood or Brick
  Viruses
  Vitamin C and Cancer
  Laughter Works
  Memories of School Years
  Manners on the Road
  Water in a Growing Plant
  Lecture Method
  Safeguard It
  Types of Personality
  Reference Keys