单选题 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(手机应用) 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 potheole, 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. (79) 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).
(80) 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.

单选题 Which of the following is the best title for the passage?

【正确答案】 B

【答案解析】[解析] 第一段最后一句“His solution: an app that warns drivers when there is a pothole ahead.”。
综合分析题。题干问的是“下列哪个最适合做文章的标题?”根据定位句“他的结论就是：通过一个手机应用提醒司机前方有坑洼问题。”可知文章主要是关于如何使用这种手机应用来应对路面坑洼问题的。A项“交通堵塞问题的解决方法”；B项“监测路面坑洼的手机应用”；C项“大城市的路面坑洼问题”；D项“糟糕的道路状况”。B项最符合文章的意思，故选B。

单选题 The phrase kick off in Paragraph 1 is closest in meaning to ______.

【正确答案】 C

【答案解析】[解析] 第一段第二句“The eighth-grader was inspired to kick off his mission on a recent morning, when his mother was driving him to school.”。
词汇题。题干问的是“第一段中的同组kick off在意思上最接近哪个词?”A项“离开”；B项“发明”；C项“开始”；D项“转移，变化”。分别代入定位句，结合上下文，C项最符合，故选C。

单选题 People use the 311 call system to report ______.

【正确答案】 C

【答案解析】[解析] 第三段第三句话“Through the call system, citizens dial 3-1-1 to report non-emergency problems—which include potholes.”。
细节题。题干问的是“人们用311电话系统报告什么?”根据定位句“通过电话系统，市民拨打311来报告非紧急的情况，包括路面坑洼情况”可知答案。故选C。

单选题 The prototype focuses on ______ streets in Jackson.

【正确答案】 A

【答案解析】[解析] 第三段最后一句话“Chokwe and his friends determined that focusing on the 10 busiest streets in Jackson...”。
细节题。题干问的是“原型测试主要是根据杰克逊市多少条道路的情况进行?”根据定位句“乔科韦和他的朋友们认为重点关注从杰克逊市最繁忙的10条街道采集的信息…”可知，是10条街道，故选A。

单选题 According to the passage, which of the following statements is TRUE?

【正确答案】 C

【答案解析】[解析] 第二段第一句话“Chokwe developed the app with his friends Rodriguez Ratliff and Emmanuel Brooks.”；第四段第一句话“Although the app isn"t yet available for sale...”；第一段第三句“Their car was damaged as it went over a huge pothole in the middle of the street...”；第三段第二句“It works by using the city"s 311 call system...”。
综合分析题。题干问的是“根据文章，下列哪项是正确的?”根据定位句“乔科韦和他的朋友罗德里格斯·拉特利夫及艾玛纽尔·布鲁克斯一起开发了这个手机应用。”(A项)；“尽管这个手机应用软件还没有用于销售…”(B项)；“在通过路中间一个大坑洞的时候，车子损坏了。”(C项)；“应用是通过城市311电话呼叫系统运作的…”(D项)可知，答案中只有C项是符合文中原义的，故选C。