[单项选择]"These days, executives are more fastidious about presentation and persona," indicates Jack Hilton, whose New York-based consulting firm advises top management ______ television.
A. by use of
B. in the usage of
C. by the using of
D. in use of

These days a green building means more than just the color of the paint. Green buildings can also refer to environmentally friendly house, factories, and offices.
Buildings account for 65 percent of total U. S. electricity use. But green buildings can reduce energy and water use. Also, the buildings are often located near public transportation such as buses and subways, so that people can drive their cars less. That could be good for the environment, because cars use lots of natural resources such as gasoline, and give off pollution. Green buildings are often built on previously developed land, so that the buildings don’t destroy forests or other wild habitats(栖息地).
Marry Dettling is project manager for a building that puts these ideas into action. The Solaire has been called the country’ s first green residential high-rise building. According to Dettling, "We’ve reduced our energy consumption by one-third and our water by ,50 percen
A. draining wild habitats
B. developing new land
C. clearing the ground in a forest
D. making use of the developed land