【摘要】2013英语四六级在即，精品学习网小编在此为大家编辑了“历年六级完形填空真题原文：塑料的真相”，供大家参考，希望对四六级考生有所帮助。祝大家取得理想的成绩!
题目"The Truth About Plastic" 塑料的真相。
If you know where to find a good plastic-free shampoo, can you tell Jeanne Haegele? Last September, the 28-year-old Chicago resident resolved to cut plastics out of her life. The marketing coordinator was concerned about what the chemicals leaching out of some common types of plastic might be doing to her body. She was also worried about the damage all the plastic refuse was doing to the environment. So she hopped on her bike and rode to the nearest grocery store to see what she could find that didn't include plastic. "I went in and barely bought anything," Haegele says. She did purchase some canned food and a carton of milk--only to discover later that both containers were lined with plastic resin. "Plastic," she says, "just seemed like it was in everything."
She's right. Back when Dustin Hoffman received the most famous one-word piece of career advice in cinema history, plastic was well on its way to becoming a staple of American life. The U.S. produced 28 million tons of plastic waste in 2005--27 million tons of which ended up in landfills. Our food and water come wrapped in plastic. It's used in our phones and our computers, the cars we drive and the planes we ride in. But the infinitely adaptable substance has its dark side. Environmentalists fret about the petroleum needed to make it. Parents worry about the possibility of toxic chemicals making their way from household plastic into children's bloodstreams. Which means Haegele isn't the only person trying to cut plastic out of her life--she isn't even the only one blogging about this kind of endeavor. But those who've tried know it's far from easy to go plastic-free. "These things are so ubiquitous that it is practically impossible to avoid coming into contact with them," says Frederick vom Saal, a biologist at the University of Missouri.
Vom Saal is a prominent member of a group of researchers who have raised worrisome questions in recent years about the safety of some common types of plastics. We think of plastic as essentially inert; after all, it takes hundreds of years for a plastic bottle to degrade in a landfill. But as plastic ages or is exposed to heat or stress, it can release trace amounts of some of its ingredients. Of particular concern these days are bisphenol-a (BPA), used to strengthen some plastics, and phthalates, used to soften others. Each ingredient is a part of hundreds of household items; BPA is in everything from baby bottles to can linings (to protect against E. coli and botulism), while phthalates are found in children's toys as well as vinyl shower curtains. And those chemicals can get inside us through the food, water and bits of dust we consume or even by being absorbed through our skin. Indeed, the Centers for Disease Control and Prevention reported that 92% of Americans age 6 or older test positive for BPA--a sign of just how common the chemical is in our plastic universe.