Exercise 5 (200606)
　　The part of the environmental movement that draws my firm's attention is the design of cities, buildings and products. When we designed America's first so-called "green" office building in New York two decades   71  _, we felt very alone. But today, thousands of people come to green building conferences, and the   72   that buildings can be good for people and the environment will be increasingly influential in years to   73   .
　　Back in 1984 we discovered that most manufactured products for decoration weren't designed for   74   use. The "energy-efficient" sealed commercial buildings constructed after the 1970s energy crisis   75    indoor air quality problems caused by materials such as paint, wall covering and carpet. So for 20 years，we’ve been focusing on these materials   76    to the molecules, looking for ways to make them    77   for people and the planet.
　　Home builders can now use materials—such as paints that release significantly _78_ amounts of organic compounds—that don't    79   the quality of the air, water, or soil. Ultimately.    80_  , our basic design strategy is focused not simply on being "less bad" but on creating    81   healthful materials that can be either safely returned to the soil    _82_   reused by industry again and again. As a matter of   _83   , the world's largest carpet manufacturer has already   _ 84__   a carpet that is fully and safely recyclable （可循环用的）.
Look at it this way: No one __85   out to create a building that destroys the planet. But our current industrial systems are    86   causing these conditions, whether we like it or not. So ___87_  of simply trying to reduce the damage, we are   _88_   a positive approach. We're giving people high-quality, healthful products and an opportunity to make choices that have a    89   effect on the world. It's not just the building industry, either.   90_   cities are taking these environmentally positive approaches to design, planning and building. Portland, Seattle and Boston have said they want to be green cities. Chicago wants to be the greenest city in the world.
71. A）off            B）away           C）before          D）ago
72. A）practice        B）idea            C）outlook         D）scheme
73. A）go           B）continue    C）come            D）arrive
74. A）relevant        B）indoor          C）flexible         D）inward
75. A）revealed