Unit 1
Text A：Genetically Modified Foods——Feed the World？
Text B：Genetically Modified Foods：Are 7hey Safe？
Unit 2
Text A：The Biology of Skin Color：Black and white
Text B：Immortal Avatars：Back up Your Brain，Never Die
Unit 3
Text A：Can Dirt Do a Little Good？
Text B：Urban Air Pollutants Can Damage iQs before Baby’S First Breath
Unit 4
Text A：IsTime 7ravel Possible？
Text B：Building a 7ime Machine
Unit 5
Text A：The End of E—mail Age
Text B：E—mail Gets an Instant Makeover
Unit 6
Text A：Are Cell Phones Safe？
Text B：want tO Know Your Disease Risk？Check Your Exposome
Unit 7
Text A：Seeing the Earth for Its Faults
Text B：Can Geothermal Energy Pick up Real Steam？
Unit 8
Text A：why We Are Fat？
Text B：More Protein，Less Refined Starch Important for Dieting
Unit 9
Text B ： Is Stephen Hawking Right about Aliens?
Unit 10
Text A：Video Gamers Can Control Dreams,Study Suggests
Text B：Dream States：A Peek into Consciousness
Unit 11
Text A：For Mobile Touch Technology,lt's Only the Beginning
Text B：It 's a Smart World
Unit 12
Text A：Fact or Fiction：The Days （and Nights） Are Getting Longer
Text B：The Primal and Future Moon
References
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