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  3. An office tower on Miller Street in Manchester is completely covered in solar panels. They are used to create some of the energy

An office tower on Miller Street in Manchester is completely covered in solar panels. They are used to create some of the energy

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问题    An office tower on Miller Street in Manchester is completely covered in solar panels. They are used to create some of the energy used by the insurance company inside. When the tower was first【C1】______in 1962, it was covered with thin square stones. These small square stones became a problem for the building and continued to fall off the face for 40 years until a major renovation was【C2】______During this renovation the building’s owners, CIS,【C3】______the solar panel company, Solarcentury. They agreed to cover the entire building in solar panels. In 2004, the completed CIS tower became Europe’ s largest【C4】______of vertical solar panels. A vertical solar project on such a large【C5】______has never been repeated since.
   Covering a skyscraper with solar panels had never been done before, and the CIS tower was chosen as one of the "10 best green energy projects". For a long time after this renovation project, it was the tallest building in the United Kingdom, but it was【C6】______overtaken by the Millbank Tower.
   Green buildings like this aren’ t【C7】______cost-efficient for the investor, but it does produce much less pollution than that caused by energy【C8】______through fossil fuels. As solar panels get【C9】______, the world is likely to see more skyscrapers covered in solar panels, collecting energy much like trees do. Imagine a world where building the tallest skyscraper wasn’ t a race of【C10】______, but rather one to collect the most solar energy.
   A) cheaper        I) eventually
   B) cleaner         J) height
   C) collection       K) necessarily
   D) competed       L) production
   E) constructed      M) range
   F) consulted        N) scale
   G) dimension       O) undertaken
   H) discovered
【C2】
选项
答案O
解析 空格前为be动词was，空后无单词，故本空需要填入一个动词过去分词形式表被动。结合句意可知，这些小方形石头成了建筑的一个问题，40年来一直从表面脱落，直到进行了大规模的翻修。备选项中只有undertaken(从事，开始进行)与前文衔接紧密，故答案为O。
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大学英语四级

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