2. 外语
  3. When we think of green buildings, we tend to think of new ones—the kind of high-tech, solar-paneled (装有太阳能板的) masterpieces that【

When we think of green buildings, we tend to think of new ones—the kind of high-tech, solar-paneled (装有太阳能板的) masterpieces that【

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问题     When we think of green buildings, we tend to think of new ones—the kind of high-tech, solar-paneled (装有太阳能板的) masterpieces that【C1】______the covers of architecture magazines. But the U.S. has more than 100 million existing homes, and it would be【C2】______wasteful to tear them all【C3】______and replace them with greener versions. An enormous amount of energy and resources went into the【C4】______of those dwellings. And it would【C5】______65 years for the reduced carbon emissions from a new energy-efficient home to make up【C6】______the resources lost by destroying an old one. So in the broadest【C7】______the greenest home is the one that has already been【C8】______But at the same time, nearly half of U.S. carbon emissions come from heating, cooling and【C9】______our homes, offices and other buildings. "You can’t deal with climate change【C10】______dealing with existing buildings," says Richard Moe, the president of the National Trust.
    With some【C11】______the oldest homes tend to be the least energy-efficient. Houses built before 1939 use about 50% more energy per square foot than【C12】________built after 2000, mainly【C13】______the tiny cracks and gaps that expand【C14】______time and let in more outside air.
    【C15】______there are a tremendous number of relatively simple changes that can green older homes,【C16】______historic ones like Lincoln’s Cottage to your own postwar house. And efficiency【C17】______can save more than just the earth; they can help【C18】______house owners from rising power costs.【C19】______a nationwide effort to improve existing buildings could【C20】______hundreds of thousands of green jobs.
【C13】
选项 A、with regard to
B、in case
C、due to
D、as to
答案C
解析 介词短语辨析题。根据原文可知，1939年前建造的房屋比2000年后建造的房屋多耗能50％，而越来越大的缝隙是造成这个现象的主要原因，因此根据句意应该选择due to(由于)。with regard to：关于；in case：万一；as to：关于。
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