【正文】 C. Margaret Thatcher. D. Tony Blair. 22. Which writer was once a politician? A. Ben Pimlott. B. Charles Moore. C. John Campbell. D. Roy Jenkins. 23. What’s purpose of the author’s writing the passage? A. To introduce some histories on selections. B. To remend some books on leaders. C. To tell some mysteries about historians. D. To think highly of some famous leaders. B LAS VEGAS — It was different in the light of day. There was no ‘pop, pop, pop’ of gunfire, no screams. Just a quiet lot of cars abandoned by those, like Kassidy Owen, who escaped with their lives. “It’s strange to hear the silence,” Owen said, “because all I remember was the noise.” The 22yearold was one of dozens of concertgoers who returned to the scene of the Route 91 Harvest festival on Wednesday morning to fetch the vehicles they left behind as they fled from a gunman raining down bullets from high above in the tower of the Mandalay Bay Resort and Casino across the street. Survivors of the deadly mass shooting in Las Vegas on Sunday needed their cars to move on with their lives — to get back to work, to school, home. It was the first time they were returning to a scene that would forever change them, when joy and celebration and music turned into killing and horror. Before they could move forward, they had to go back to the place where they thought they were going to die. Owen had run to her car to hide and had tried to drive away, but she couldn’t. People were running, bodies dropped to the ground, and cars bottlenecked in the parking lot. During a brief pause after more than 10 minutes of gunfire, she worried the lights of her SUV made everyone inside a shining target. “They’re shooting again!” her best friend’s bro ther screamed. “‘Turn off the car!’” That’s when she got out and fled. “I just remember shutting the door and running,” Owen said. Now, nearly three days later, she was back, sitting in the driver’s seat of her SUV. Her eyes were swollen and red. This was a long way from over. “You just keep hearing the gunshots in your head,” Owen said. 24. Why did Kassidy Owen return to the scene of terror? A. To get back her car for daily life. B. To show sympathy to the victims. C. To search for her missing friends. D. To look into the cause of the shooting. 25. Where was the gunman when the mass shooting happened? A. Behind a car. B. In the parking lot. C. On the stage. D. In a tall building. 26. Why did Owen keep hearing the gunshots in her head? A. Because she had escaped being caught. B. Because she wanted to find the gunman. C. Because she couldn’t rid herself of those terrible scenes. D. Because she had saved others’ lives by turning off the car. 27. Where is the text probably taken from? A. A story book. B. A newspaper. C. A guide book. D. A research report. C Cities are likely to be affected by overheating, thanks to something called the urban heat island effect. Cities tend to be short of trees, which provide shade, and they are covered with black pavement, which absorbs heat from the sun. Think of how it feels to wear a dark shirt versus a white shirt on a sunny day. A black shirt absorbs light, heating you up. But a white shirt reflects light, keeping you cool. The average temperature in a city of a million or more people can be more than 5 degrees F hotter than surrounding areas. That extra 5 degrees can turn a hot day from unfortable to deadly. As temperatures rise, cities will be an especially dangerous place to be during a heat wave. To protect public health, city officials are going to make the city cooler. As part of that effort, Los Angeles is coating its roads in CoolSeal, a gray paint that keeps streets and parking lots 10 degrees cooler than black asphalt（瀝 青） . It will help Angelinos save money during the summer, when air conditioning sends power bills soaring. And it will save lives by lowering temperatures and improving air quality. Hot weather worsens air pollution by turning car exhaust into smog, which can make life miserable for people with asthma（哮喘） and other breathing problems. Of course, LA will have to do more than paint over a few streets to cool off the city. Angelinos will also need to plant more trees and apply white paint to rooftops?— ?at least those not already covered in solar panels. While LA is a pioneer of reflective streets, other cities, like New York, are already experimenting with reflective roofs or, like Melbourne, lowering the temperature by planting trees. LA is hardly alone in its effor