单项选择题
[听力原文] W: When will the train leave M: It’s said to begin at 13:00 o’clock, and now it’s 12:38.
A．22 minutes. B．32 minutes. C．12 minutes. D．2 minutes.
A．Environmental pollution may have far-reaching consequences. B．Any or all of these ecosystem functions may be impaired or destroyed by pollution. C．Ecosystems perform many important services for the earth’s environment. D．Pollution also has a great influence on natural resources.
A．rest B．paying C．powering D．being exhausted