实践篇 3
Unit One Why NASA Barred Women Astronauts 3
Timed Reading： Shuttle Launched： One Giant Leap for Womankind 10
Unit Two H1N1 （Swine） Flu 12
Timed Reading： Coping with Colds 20
Unit Three Computers in Cars 23
Timed Reading： Two Views on Neural Computers 29
Unit Four Giraffes 31
Timed Reading： Gorilla Is Not as Mean as It Looks 38
Unit Five Building a Food Pyramid 40
Timed Reading： In Search of the Perfect French Fry 48
Unit Six Chew for Health 51
Timed Reading： Chew on This： Gum May Be Good for Body， Mind 59
Unit Seven “Fat” Gene Found by Scientists 62
Timed Reading： Kids with Obesity-linked Gene Like Fattening Foods 70
Unit Eight Can Laughter Cure Illness？ 72
Timed Reading： Are Happy People Healthier？ 79
Unit Nine Four Ways to Achieve Greater Happiness in Your Life 81
Timed Reading： Depression 88
Unit Ten Teens and Plastic Surgery 91
Timed Reading： Risks and Rewards of Plastic Surgery 98
Unit Eleven Wind Power May Have Its Own Environmental Problems 101
Timed Reading： White Roofs to Fight Global Warming 108
Unit Twelve Greenhouse Effect for Kids 111
Timed Reading： Facts about the Greenhouse Effect 117
Unit Thirteen The Greenest Green Energy—Fuel from Algae 119
Timed Reading： Alternative Energy 125
Unit Fourteen Ten Freaky Forces of Nature 127
Timed Reading： Raining Animals and Coins： Mystery of the History 135
Unit Fifteen Blue If You Want to Be Creative， Red If You Want to Be Diligent 137
Timed Reading： How Do We See Red？ Count the Ways 145
Unit Sixteen Short Sleeper 147
Timed Reading： Genetic Mutation May Be Why Some People Need Less Sleep Than Others 154
Unit Seventeen Cloning 157
Timed Reading： How Do I Know if I’m Eating Cloned Meat？ 164
Unit Eighteen The Internet Is Sick 166
Timed Reading： The Future of the Internet 174
Unit Nineteen Could Life on Earth Have Come From Ceres？ 176
Timed Reading： Life’s Evolution May Depend on Galaxy 183
Unit Twenty Pyramids 185
Timed Reading： Egyptian Lion Mummy Found in Ancient Tomb 191
真题篇 195
Test 1 CET- 4， 2009年6月 How Do You See Diversity？ 195
Test 2 CET-4， 2008年12月 That’s Enough， Kids 198
Test 3 CET-4， 2008年6月 Media Selection for Advertisements 201
Test 4 CET-4， 2007年12月 Universities Branch Out 204
Test 5 CET-4， 2007年6月 Protect Your Privacy When Job-hunting Online 207
Test 6 CET-6， 2009年6月 Helicopter Moms vs.Free-range Kids 210
Test 7 CET-6， 2008年12月 Supersize Surprise 213
Test 8 CET-6， 2008年6月 What Will the World Be Like in Fifty Years？ 216
Test 9 CET-6， 2007年12月 Seven Ways to Save the World 219
Test 10 CET-6， 2007年6月 Seven Steps to a More Fulfilling Job 222