前辅文
 Introduction to Important Reading Strategies and Skills
 UNIT 1 Learning
  Text A Learning and the Brain
  Text B Prehistoric Viruses and the Function of the Brain
 UNIT 2 Employer and Employee Satisfaction
  Text A Resisting the Depersonalization of the Work Space
  Text B Stupid Jobs Are Good to Relax With
 UNIT 3 Social Problems
  Text A Workplace Violence Is a Source of and Reaction to Stress
  Text B To Arm or Not to Arm
 UNIT 4 Traffic and Transportation
  Text A Seat Belt Usage
  Text B Self-driving Cars to Test City Limits
 UNIT 5 New Technologies
  Text A New Technologies Create New Problems
  Text B How to Use Your Laptop to Locate an Earthquake
 UNIT 6 Competition
  Text A Knowledge-based Competition
  Text B How Winning Leads to Cheating
 UNIT 7 Energy
  Text A Energy Sources and Uses
  Text B What Breakthroughs Do Biofuels Need?
 UNIT 8 Health
  Text A Should Dentists Offer Health Screenings?
  Text B A New Way to Detect Parkinson’s — by Smell
 UNIT 9 Forest and Nature
  Text A Dry, Hot and Windy
  Text B Drug Trafficking Poses Surprising Threats to Rain Forests
 UNIT 10 Ecosystem
  Text A Can Ecosystems Be Restored?
  Text B Ocean Heat Waves Are Getting Worse
 UNIT 11 Deserts
  Text A Deserts
  Text B Sahara
 UNIT 12 Tourist Attractions
  Text A Grand Canyon National Park
  Text B Death Valley’s Harsh Environment Home to Beauty, Wonder
 UNIT 13 Public Concerns
  Text A Privacy, Neither Absolute nor Highly Valued
  Text B FaceApp, Aging and Loneliness
 UNIT 14 Invention
  Text A About Crittercam
  Text B Steven Jobs
 UNIT 15 Environment
  Text A European Youth Face Environmental Hazards
  Text B What Killed the Great Beasts of North America?
 UNIT 16 Living Species
  Text A Warming to Extinction
  Text B Pesticides Are Killing off the Andean Condor
 Answer Keys