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Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．The Black Plague.
B．Common Animal pests.
C．Enemy of Humanity.
D．Causes of World Hunger.

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The passage gives a description of the contamination in New Orleans after Hurricane Katrina.

Passage OneQuestions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。