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 magazines. But the US has more than 100 million existing homes, and it would be __1__ wasteful to tear them all down and __2__ 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 __3__ carbon emissions from a new energy-efficient home to make up for the resources lost by destroying an old one. So in the broadest __4__, 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 __5__ our homes, offices and other buildings. "You can't deal with climate change without dealing with existing building," says Richard Moe, the president of the National Trust.With some __6__, the oldest homes tend to be the least energy-efficient. Houses built before 1939 use about 50% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps that __7__ over time and let in more outside air.Fortunately, there are a __8__ number of relatively simple changes that can green older homes, from __9__ 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 __10__ property owners from rising power costs.[A] accommodations[B] clumsy[C] doubtfully[D] exceptions[E] expand[F] historic[G] incredibly[H] powering[I] protect[J] reduced[K] replace[L] sense[M] shifted[N] supplying[O] vast答案解析：1. 【答案】G)。
【精析】副词辨析题。
空格前面是be动词，后面为形容词wasteful，因此空格处需要填入一个副词。
前一句中提到美国现有住宅1亿多所，该句指出，如果全部拆毁，造成的浪费必然。
incredibly"不能相信地，难以置信地"符合题意。
2. 【答案】K)。
【精析】动词辨析题。
空格前面有连词and，通过分析句子结构可知，空格处的词语与前面的动词tear为并列关系，因此空格处需要填入动词原形。
文章首句提到，绿色环保型住宅备受欢迎。
本句中承接首句指出，如果拆毁现有住宅，绿色环保型住宅，将造成一种浪费。
因此空格处应填入具有"重新建成"或"取而代之"意义的词，且与后面的介词with构成搭配。
备选动词中符合以上两点要求的只有replace。
replace...with...意为"用……取代……"。
3. 【答案】J)。
【精析】形容词辨析题。
空格前面有定冠词the，后面有名词carbon emissions，因此需要填入一个形容词。
文章围绕green buildings展开，也就是本句中提到的new energy-efficient home。
而这种新型的绿色环保建筑的最大特点就是能够碳的排放，填入reduced"减少的"符合句意。
这样也就能与后面的不定式部分的句意"补偿拆毁旧住宅所造成的资源浪费"保持一致。
4. 【答案】L)。
【精析】名词辨析题。
空格前为形容词最高级，因此其后应该填入名词，且该名词需要和前面的broadest搭配。
备选名词中能够和broadest搭配的只有sense。
实际上，此处为固定搭配in the broadest sense，意为"从广义上来讲"，是我们熟悉的短语in a sense 的变化形式。
5. 【答案】H)。
【精析】动词辨析题。
空格前面有连词and，由此可知空格处的词语与前面的heating和cooling是并列关系，因此推断空格处的词应该也为动名词形式。
动名词形式有两个，分别是powering和supplying，其中supplying常与with搭配，意为"供应"，此处不符合句意。
powering"向……提供能量"与前面的heating和cooling在意义上具有相关性，为正确答案。
6. 【答案】D)。
【精析】名词辨析题。
空格前有介词With，还有形容词some，所以需要填入名词一起构成句子的状语。
选项中名词还有accommodations和exceptions两个。
accommodations"住处"不符合句意。
选择exceptions"例外"构成短语with some exceptions，意为"除了一些特殊情况外"。
7. 【答案】E)。
【精析】动词辨析题。
通过分析句子结构可知，空格位于that引导的定语从句中，连词and前的句子缺少谓语动词，且与and后面的let为并列关系，所以空格处应填入动词原形。
句中的tiny cracks and gaps指的是"狭小的缝隙和缺口"，随着时间流逝，它们会，从而导致外界更多的空气流入室内。
可知，expand"扩展，增大"符合句意。
8. 【答案】O)。
【精析】形容词辨析题。
空格前面有不定冠词a，后面为名词number，因此空格处需要填入一个形容词。
此处的a number of为固定短语，意思是"大量的"，number前可以加上一些表示程度的形容词，如great，large，vast等，表示"数量极大的"。
因此，形容词备选项中，vast"巨大的"符合句意。
9. 【答案】F)。
【精析】形容词辨析题。
空格后面为ones，所以空格处需要填入形容词作定语。
在意义上，句中存在from...to...结构，表示一种转变或变化，因此空格处的形容词应该和to后面处于定语位置的postwar在意义上相对。
postwar指二战以后，是一个较近的时间。
因此，空格处词应该具有"较早的，久远的"的意思。
另外，从句中举出的例子Lincoln's Cottage（林肯故居）也可以验证这一推断。
所以historic"历史上著名的，有历史意义的"符合句意，为本题答案。
10. 【答案】I)。
【精析】动词辨析题。
空格前面有动词help，后面有名词短语，而help不能与后面的介词from搭配使用，因此排除空格处为形容词的可能性，空格处应该为省略to的动词不定式。
另外，从句意上来看，这一句承接上句，仍然在陈述为老住宅进行升级的好处。
备选动词中符合结构和句意双重要求的只有protect，因此为本题答案In families with two working parents, fathers may have more impact on a child's language development than mothers, a new study suggests.Researchers __1__ 92 families from 11 child care centers before their children were a year old, interviewing each to establish income, level of education and child care arrangements. Overall, it was a group of well-educated middle-class families, with married parents both living in the home.When the children were 2, researchers videotaped them at home in free-play sessions with both parents, __2__ all of their speech. The study will appear in the November issue of The Journal of Applied Development of Psychology. The scientists measured the __3__ number of utterances (话语) of the parents, the number of diffe-rent words they used, the complexity of their sentences andother __4__ of their speech. On average, fathers spoke less than mothers did, but they did not differ in the length of utterances or proportion of questions asked.Finally, the researchers __5__ the children's speech at age 3, using a standardized language test. The only predictors of high scores on the test were the mother's level of education, the __6__ of child care and the number of different words the father used.The researchers are __7__ why the father's speech, and not the mother's, had an effect."It's well __8__ that the mother's language does have an impact," said Nadya Pancsofar, the lead author of the study. It could be that the high-functioning mothers in the study had __9__ had a strong influence on their children's speech development, Ms. Pancsofar said, "or it may be that mothers are __10__ in a way we didn't measure in the study."[A] already[B] analyzed[C] aspects[D] characters[E] contributing[F] describing[G] established[H] quality[I] quoted[J] recording[K] recruited[L] total[M] unconscious[N] unsure[O] yet答案解析：1. 【答案】K【精析】动词辨析题。