Chokwe Selassie is on a mission to help drivers avoid potholes(路面坑洼). The eighth-grader was inspired to kick off his mission 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."I decided I was going to do something about the pothole problem in my city,"Chokwe says. His solution: an app that warns drivers when there is a pothole ahead. Chokwe developed the app with his friends Rodriguez Ratliff and Emmanuel Brooks."When the app detects a pothole, it is highlighted(突出显示)in red,"Chokwe says."And if you get close to the pothole,your phone will warn you.”Drivers can also use the app to report any potholes they encounter, and to 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."It works by using the city's 311 call system, so it uses information already stored in a database,"Chokwe says. Through the call system, citizens dial 3-1-1 to report non-emergency problems—which include potholes. Chokwe and his friends determined that focusing on the 10 busiest streets in Jackson would give them a large enough sample size to test the prototype(原型).
Although the app isn't yet available for sale, Chokwe is already looking for ways to improve it.The prototype remains limited to 10 streets in Jackson, but he hopes to add more, so that it includes every street in the city. And then he wants to go even farther."I want to keep working on the app until it's nationwide,"Chokwe says.
Which of the following is the best title for the passage?
通读全文可知，本文介绍了Chokwe Selassie和他的朋友开发的一款应用程序，它可以在车辆前方有路面坑洼时提醒司机。文中简述了这款应用程序的运作过程，并表明Chokwe之后想改进这款应用程序，并将它在全国推广。由此可推知，B项(一款探测路面坑洼的应用程序)最适合作本文标题。故选B。
The phrase "kick off" in Paragraph 1 is closest in meaning to"_____".
根据第一段第二句"The eighth-grader was inspired to kick off his mission on are cent morning, when his mother was driving him to school.”和第一段第四句"'I decided I was going to do something.'…”可知，在最近的一个早上，当他的母亲正开车送他去学校时，这名八年级学生受到启发，开始了他的任务。Chokwe说：“我决定要为我所在城市的路面坑洼问题做点什么。”由此可推知，kick off和was going to do的意思相近，意为“开始"。leave:离开(某人或某处);invent:发明；begin:开始；shift:转移。故选C。
People use the 311 call system to report_____.
根据第二段第三句"Through the call system, citizens dial 3-1-1 to report non-emergency problems…"可知，通过这个呼叫系统，人们拨打3-1-1来报告非紧急问题，其中包括路面坑洼的问题。故选C。
The prototype focuses on______streets in Jackson.
根据第二段最后一句"Chokwe and his friends determined that focusing on the 10 busiest streets in Jackson would give them a large enough sample size to test the prototype.”可知，Chokwe和他的朋友们决定聚焦在杰克逊最繁忙的10条街道上，这会给他们提供足够大的样本量来测试原型。故选A。
According to the passage, which of the following statements is TRUE?
根据第一段第三句"Their car was damaged as it went over a huge pothole in the middle of the street…"可知，他们的车(即Chokwe妈妈开的车)在经过一个位于道路中央的大坑洼时损坏了，所以C项正确。根据第一段第六句"Chokwe developed the appwith his friends Rodriguez Ratliff and Emmanuel Brooks."可知，Chokwe和他的朋友Rodriguez Ratliff及Emmanuel Brooks一起开发了这款应用程序，所以A项错误；根据最后一段第一句“Although the app isn't yet available for sale..”可知，这款应用程序还没有上市销售，所以B项错误；根据第二段第二句"'It works by using the city's 311 call system, so it uses information already stored in a database,'…"可知，该应用程序使用的是城市311呼叫系统，所以D项错误。故选C。