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L) The college admission essay contains the grandest American themes―status anxiety, parental piety (孝顺), intellectual standards—and so it is only a matter of time before it becomes infected by the country's culture of excessive concern with self-esteem.
					出自-2013年12月阅读原文
				 
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The Sudan version was deadly enough, killing 50% of those it infected.
					出自-2013年6月听力原文
				 
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If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic
					出自-2013年6月听力原文
				 
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How do people get infected with the disease according to the speaker?
					出自-2013年6月听力原文