1．Chokwe Selassie，aged 13，is working hard to help drivers avoid potholes（坑洼）．The eighth-grader was inspired to kick off his creation on a recent morning，when his mother was driving him to school．Their car was damaged as it went over a huge pothole in the middle of the street in their hometown of Jackson，Mississippi．He decided to do something about the pothole problem in his city．
Chokwe developed the app with his friends Rodriguez Ratliff and Emmanuel Brooks．When the app detects a pothole，it is highlighted in red．And if you get close to the pothole，your phone will warn you with a beep．Drivers can also use the app to report any potholes and look for other routes they can take to avoid roads that have them．
The app relies on current available information about the streets of Jackson，already stored in a database of the city's 311call system．Through the call system，citizens dial 3-1-1to report non-emergency problems which include potholes．Chokwe and his friends determined that focusing on the 10busiest streets in Jackson would give them a large enough sample size to test the prototype．
While developing the app，the boys took part in a Minority Male Makers Program sponsored by Verizon and held at Jackson State University．They learned 3D printing and design，and how to create apps．Through the program Chokwe and his friends received encouragement and guidance．
Although the app isn't yet available for sale，Chokwe is already looking for ways to improve the app．He hopes to add more to it until it spreads all over the country．
24．Why is the car damage mentioned in the first paragraph？C
A．To scold the road builders．
B．To introduce their bad luck．
C．To tell the inspiration for the app．
D．To warn the danger of careless driving．
25．What is the app used to do？A
A．Warn drivers about potholes．
B．Help drivers obey traffic rules．
C．Stop drivers using mobile phones．
D．Tell drivers to avoid red lights．
26．How does the app work through the 311call system？D
A．By replying to citizens'calls．
B．By broadcasting traffic accidents．
C．By settling non-emergency problems．
D．By using its information about potholes．
27．Which can be Chokwe's future target？D
A．Encouraging more kids to create apps．
B．Taking part in more learning programs．
C．Making the app available for sale online．
D．Making the app include streets nationwide．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了一个应用程序是用来警告司机坑洞的．
解答 24．C．细节理解题．根据第一段Their car was damaged as it went over a huge pothole in the middle of the street in their hometown of Jackson，Mississippi．He decided to do something about the pothole problem in his city可知第一段提到汽车损坏是为了讲述应用程序的灵感；故选C．
25．A．细节理解题．根据第二段When the app detects a pothole，it is highlighted in red．And if you get close to the pothole，your phone will warn you with a beep可知应用程序是用来警告司机坑洞的；故选A．
26．D．细节理解题．根据第三段The app relies on current available information about the streets of Jackson，already stored in a database of the city's 311call system．Through the call system，citizens dial 3-1-1to report non-emergency problems which include potholes可知应用程序是通过应用311系统的坑洞信息工作的；故选D．
27．D．细节理解题．根据最后一段Although the app isn't yet available for sale，Chokwe is already looking for ways to improve the app．He hopes to add more to it until it spreads all over the country可知Chokwe未来的目标是在全国街道使用程序；故选D．
点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
