Unit One Passage A Making Energy Clean,Safe,and Affordable Passage B Back to the Future Passage C Seeing Green Unit Two Passage A How Progress Makes Us Sick Passage B Investing in the Rural Poor Passage C The hallenge We Face Unit Three Passage A How to Grow Old Passage B “Much Madness is Divinest Sense” Passage C Early Warnings Unit Four Passage A Saved By Strangers Passage B “I'm Not Letting You Go,Dad” Passage C No Time To Panic Unit Five Passage A Genetically Engineered Secret Ingredients Passage B Health Alert:New Facts About Food Poisoning Passage C Six Critical Symptoms Patients Overlook Unit Six Passage A The Chess Goddess Passage B On the Path to Everest Passage C Glory in the Afternoon Unit Seven Passage A Buckingham Palace:Symbol of Strength and TRADITION Passage B Battle of Gettysburg Passage C 1796:The First Real Election Unit Eight Passage A Nestle's Quisk Passage B Never Say Never Passage C Rudolph Ran and World Went Wild Unit Nine Passage A Paying to Keep Your Job Passage B New Financial Narkets Passage C What Supermarkets Know About You Unit Ten Passage A Going Mobile Passage B Dolly,You're History Passage C Digital Cities