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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        F) consulted      K) necessarily
    B)  cleaner        G) dimension      L) production
    C)  collection     H) discovered     M) range
    D)  competed       I) eventually     N) scale
    E)  constructed    J) height         O) undertaken
【C7】
选项
答案K
解析 本空前为aren’t，后有形容词cost-efficient，因此应填入副词来修饰形容词。本句指出，像这样的绿色建筑对投资者来说不________划算。but前后形成对比，but之后用does来强调动词produce，but之前的内容应该不是十分确定。由此可知，本空填入的副词与not连用皮带有“不一定”的含义，因此答案为K)necessarily。
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大学英语四级

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