实践篇
Unit One Why NASA Barred Women Astronauts
Timed Reading： Shuttle Launched： One Giant Leap for Womankind
Unit Two H1N1 （Swine） Flu
Timed Reading： Coping with Colds
Unit Three Computers in Cars
Timed Reading： Two Views on Neural Computers
Unit Four Giraffes
Timed Reading： Gorilla Is Not as Mean as It Looks
Unit Five Building a Food Pyramid
Timed Reading： In Search of the Perfect French Fry
Unit Six Chew for Health
Timed Reading： Chew on This： Gum May Be Good for Body， Mind
Unit Seven "Fat" Gene Found by Scientists
Timed Reading： Kids with Obesity-linked Gene Like Fattening Foods
Unit Eight Can Laughter Cure Illness?
Timed Reading： Are Happy People Healthier?
Unit Nine Four Ways to Achieve Greater Happiness in Your Life
Timed Reading： Depression
Unit Ten Teens and Plastic Surgery
Timed Reading： Risks and Rewards of Plastic Surgery
Unit Eleven Wind Power May Have Its Own Environmental Problems
Timed Reading： White Roofs to Fight Global Warming
Unit Twelve Greenhouse Effect for Kids
Timed Reading： Facts about the Greenhouse Effect
Unit Thirteen The Greenest Green Energy——Fuel from Algae
Timed Reading： Alternative Energy
Unit Fourteen Ten Freaky Forces of Nature
Timed Reading： Raining Animals and Coins： Mystery of the History
Unit Fifteen Blue If You Want to Be Creative， Red If You Want to Be Diligent
Timed Reading： How Do We See Red? Count the Ways
Unit Sixteen Short Sleeper
Timed Reading： Genetic Mutation May Be Why Some People Need Less Sleep Than Others
Unit Seventeen Cloning
Timed Reading： How Do I Know if I'm Eating Cloned Meat?
Unit Eighteen The Internet Is Sick
Timed Reading： The Future of the Internet
Unit Nineteen Could Life on Earth Have Come From Ceres?
Timed Reading： Life's Evolution May Depend on Galaxy
Unit Twenty Pyramids
Timed Reading： Egyptian Lion Mummy Found in Ancient Tomb
真题
Test 1 CET-4， 2009年6月
How Do You See Diversity?
Test 2 CET-4， 2008年12月
That's Enough， Kids
Test 3 CET-4， 2008年6月
Media Selection for Advertisements
Test 4 CET-4， 2007年12月
Universities Branch Out
Test 5 CET-4， 2007年6月
Protect Your Privacy When Job-hunting Online
Test 6 CET-6， 2009年6月
Helicopter Moms vs Free-range Kids
Test 7 CET-6， 2008年12月
Supersize Surprise
Test 8 CET-6， 2008年6月
What Will the World Be Like in Fifty Years?
Test 9 CET-6， 2007年12月
Seven Ways to Save the World
Test 10 CET-6， 2007年6月
Seven Steps to a More Fulfilling Job
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