In this section, there is a passage with10 blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item. You may not use any of the words in the bank more than once. 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, Solar century. They agreed to cover the entire building in solar panels. In 2004, the completed 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 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 __6__ overtaken by the Mill bank 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 __8__ through fossil fuels. As solar panels get __9__ , 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 __10__ , but rather one to collect the most solar energy. A)cheaper B) cleaner C) collection D) competed E) constructed F) consulted G) dimension H) discovered I) eventually J) height K) necessarily L) production M) range N) scale O) undertaken