20．A.gain

　　B．explore

　　C．take

　　D．appeal

　　解析：选C　任何人都会变老，这不需要任何天赋或能力。根据语境可知take正确。

　　.阅读理解

　　Cutting global warming pollution would not only make the planet healthier,

　　it would make people healthier too, new research suggested.

　　Cutting carbon dioxide emissions could save millions of lives, mostly by reducing preventable deaths from heart and lung diseases, according to studies released Wednesday and published in a special issue of The Lancet, British medical journal.

　　“Relying on fossil fuels leads to unhealthy lifestyles, increasing our chances of getting sick and in some cases takes years from our lives，”

　　US

　　Health

　　and

　　Human Services Secretary Kathleen Sebelius said in a telecast briefing from her home state of Kansas. “As greenhouse gas emissions go down, so do deaths from cardiovascular (心血管) and respiratory (呼吸道) diseases. This is not a small effect.”

　　Instead of looking at the ills caused by future global warming, as past studies have done, this research looks at the immediate benefits of doing something about the problem, said Linda Birnbaum, director of the US National Institute of Environmental Health Sciences.

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