2. 自考
  3. When we think of green buildings, we tend to think of new ones—the kind of high tech, solar paneled masterpieces that make the c

When we think of green buildings, we tend to think of new ones—the kind of high tech, solar paneled masterpieces that make the c

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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 masterpieces that make the covers of architecture. But the US has more than 100 million existing homes, and it would be【B1】______wasteful to tear them all down and【B2】______replace them with greener versions. An enormous amount of energy and resources went into the construction of those houses. And it would take an average of 65 years for the【B3】______carbon emissions from a new energy efficient home to make up for the resources lost by destroying an old one. So in the broadest【B4】______the greenest home is the one that has already been built. But at the same time, nearly half of US carbon emissions come from heating, cooling and【B5】______our homes, offices and other buildings. "You can’t deal with climate change without dealing with existing buildings, " says Richard Moe, the president of the National Trust.
    With some【B6】______the oldest homes tend to be the least energy efficient. Houses built before 1939 use about 34% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps that【B7】______over time and let in more outside air.
    Fortunately, there are a【B8】______number of relatively simple changes that can green older homes, from【B9】______ones like Lincoln’s Cottage to your own postwar home. And efficiency upgrades(升级)can save more than just the earth; they can help【B10】______property owners from rising power costs.
A. doubtfully
B. exceptions
C. expand
D. historic
E. incredibly
F. powering
G. protect
H. reduced
I. replace
J. sense
K. shifted
L. vast
【B2】
选项
答案I
解析 分析句子结构，该处缺少动词。句子中由and连接两个并列的动作，前面的动词与空格成分相同，所以空格所填的词应为动词原形，并且能够与with搭配。这里提到“全部推倒并用绿色建筑将会造成极大的浪费”，可知replace最适合。动词原形有expand(扩张)，protect(保护)和replace(取代)这里需要一个能够与wich搭配的动词，replace sth with sth(用……替代……)；而protect一般与from连用意为“保护……不受……”；expand与with连用时作不及物动词，意为“变大，扩大”。
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