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 ____(1) 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 ___(2). During this renovation the building's owners, CIS, ___(3) the solar panel company, Solarcentury. They agreed to cover the entire building in solar panels. In 2004, the conpleted CIS tower became Europe's largest ___(4) of vertical solar panels. A vertical solar project on such a large ___(5) has never been repeated since. Covering a skycrape 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 ___(6) overtaken by the Millbank Tower. Green buildings like this aren't ___(7) cost-efficient for the investor, but it does produce much less pollution than that caused by energy production through fossil fuels. As solar panels get cheaper, the world is likely to see more skycrapers coverd in solar panels, collecting energy much like trees do.Imange a world where building the tallest skycraper wasn't race of height , but rather one to collect the most solar energy. (2018年6月《大学英语四级》真题卷三)