【答案解析】[听力原文] 23-30 Our Firm, together with the well-known architect Robert Lee, has just completed work on designing and building a very modern office block. It's a 50,000 square meters block. Just imagine, 50,000 square meters! But this isn't all. The traditional outside walls of the block—usually in the form of concrete with small glass windows have all been replaced by glass walls. Each wall takes the form of a huge triple—glazed wall of glass on the inside of the building. It will also reduce any bright or strong sunlight. In this way, the office block has been made as comfortable as possible for everyone working in it. The walls themselves have been designed by Stephen Hill, London's leading architect. He was specially asked by the government to keep energy costs as low as possible in the building. As a result of the new and revolutionary use of the glass walls, these traditional high costs and air-conditioning costs during the hot season will be reduced to a minimum. Fixed inside the gap between the three sheets of glass are unique blinds. These blinds are controlled by small motors, and they move automatically so they reflect the sun's rays at different times of the day. The blinds also absorb the heat energy of the sun. This heat energy is then removed by natural currents of air in the gap between the glass walls. As a result, at a very small cost indeed, these walls and the gap between them create a pleasant environment at all times throughout the year, despite the weather outside. All the lighting inside the building is checked and controlled automatically, the natural light through the glass is used as much as possible. This helps to reduce the headaches and eyestrain which so many office-workers experience while trying to concentrate or work hard. The office-block is owned by a business group in Melrose and the letting agents are Peter Mao and Partners. Already 70 out of the 120 offices have been let.
关键词语：a very modern office block. It's a 50,000 square meters block.这里要听懂occupy的意思：占用，占据。
单选题
The walls consist of
【正确答案】
C
【答案解析】关键词语：The traditional outside walls of the block usual ly in the form of concrete with small glass windows have all been replaced by glass walls.由此可知，选项A、B均错误，所有的墙都是玻璃墙。因此，选项C是正确答案。
单选题
Between the outside wall of glass and the two inside walls of glass, there is ______.
【正确答案】
A
【答案解析】关键词语：Fixed inside the gap between the three sheets of glass are unique blinds.在三层玻璃墙之间的间隙，安装了特制的百叶窗，可以调整的太阳光的吸收和利用。
单选题
The gap keeps out ______.
【正确答案】
A
【答案解析】关键词语The blinds also absorb the heat energy of the sun. This heat energy is then removed by natural currents of air in the gap between the glass walls.由此可知，玻璃墙之间的间隙可以隔离热量。
单选题
Compared with other, traditional building, the amount of air-conditioning needed is ______.
【正确答案】
B
【答案解析】关键词语：As a result, at a very small cost indeed。因此，玻璃墙成本很低，相反，传统的空调系统运营成本很高。
单选题
The blinds in the gap move according to ______.
【正确答案】
B
【答案解析】关键词语：These blinds are controlled by small motors, and they move automatically so they reflect the sun's rays at different times of the day．根据太阳的光线自动调整运行。
单选题
As a result of the lighting system, people ______.
【正确答案】
A
【答案解析】关键词语：This helps to reduce the headaches and eyestrain。这样的工作环境能够减少头痛和眼睛疲劳。
单选题
Peter Mad and Partners have already let ______.
【正确答案】
B
【答案解析】关键词语：All ready 70 out of the 120 offices have been let在所有的120间办公室中，有70间被出租出去了。