单项选择题

Companies like PC&E and Weyerhaeuser tried to promote their environmental image because they ______.

A．realize its economic advantage
B．would like to be environmentally friendly
C．would defend themselves against charges
D．know the importance of sustainable growth
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单项选择题
The Aqua Power , sold by the Germany utility Bayernwerk, is ______.
A．green energy
B．less expensive
C．ordinary electricity
D．not popular
单项选择题
The author wrote this passage probably to show that ______.
A．most companies have a good environmental track record
B．actions are truly taken by companies to protect the environment
C．the real motive of companies' actions are self-centered
D．serious damages usually occur beneath the surface
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