Passage One
Questions 26 to 28 are based on the passage you have just heard.
A.Teotihuacan, once the home of 200,000 people, was the center of a large empire. B.Many archaeologists are fascinated by the ruins of a pre-Columbia city called Teotihuacan. C.Teotihuacan, once a major metropolitan area, was destroyed by an invasion. D.A still unsolved mystery is why the people of Teotihnacan suddenly abandoned their city.