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First two hours, now three hours—this is how far in advance authorities are recommending people show up to catch a domestic flig

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问题    First two hours, now three hours—this is how far in advance authorities are recommending people show up to catch a domestic flight, at least at some major U.S. airports with increasingly massive security lines.
   Americans are willing to tolerate time-consuming security procedures in return for increased safety. The crash of EgyptAir Flight 804, which terrorists may have downed over the Mediterranean Sea, provides another tragic reminder of why. But demanding too much of air travelers or providing too little security in return undermines public support for the process. And it should: Wasted time is a drag on Americans’ economic and private lives, not to mention infuriating.
   Last year, the Transportation Security Administration(TSA)found in a secret check that undercover investigators were able to sneak weapons—both fake and real—past airport security nearly every time they tried. Enhanced security measures since then, combined with a rise in airline travel due to the improving economy and low oil prices, have resulted in long waits at major airports such as Chicago’s O’Hare International. It is not yet clear how much more effective airline security has become—but the lines are obvious.
   Part of the issue is that the government did not anticipate the steep increase in airline travel, so the TSA is now rushing to get new screeners on the line. Part of the issue is that airports have only so much room for screening lanes. Another factor may be that more people are trying to overpack their carry-on bags to avoid checked-baggage fees, though the airlines strongly dispute this.
   There is one step the TSA could take that would not require remodeling airports or rushing to hire: Enroll more people in the PreCheck program. PreCheck is supposed to be a win-win for travelers and the TSA. Passengers who pass a background check are eligible to use expedited screening lanes. This allows the TSA to focus on travelers who are higher risk, saving time for everyone involved. The TSA wants to enroll 25 million people in PreCheck.
   It has not gotten anywhere close to that, and one big reason is sticker shock: Passengers must pay $85 every five years to process their background checks. Since the beginning, this price tag has been PreCheck’ s fatal flaw. Upcoming reforms might bring the price to a more reasonable level. But Congress should look into doing so directly, by helping to finance PreCheck enrollment or to cut costs in other ways.
   The TSA cannot continue diverting resources into underused PreCheck lanes while most of the traveling public suffers in unnecessary lines. It is long past time o make the program work.
The crash of EgyptAir Flight 804 is mentioned to
选项 A、stress the urgency to strengthen security worldwide.
B、explain American’ s tolerance of current security checks.
C、highlight the necessity of upgrading major U.S. Airports.
D、emphasize the importance of privacy protection.
答案B
解析 细节题。根据关键词EgyptAir Flight 804定位到第二段。该关键词所在句为本段第二句， 第一句为段落中心句，意为“美国人乐意忍受费时的安全程序作为加强安全的回报”，第二句举 EgyptAir Flight 804坠毁的例子是为了证明段落中心句，且第二句主干The crash of Egypt Air Flight 804 provides another tragic reminder of why．意为“EgyptAir Flight 804的坠毁悲惨地提醒了我们 美国人这么做的原因”，段落中心句强调“美国人乐意忍受费时的安全程序”，所以EgyptAir Flight 804的例子旨在例证为什么“美国人乐意忍受费时的安全程序”，浏览四个选项，B项是 对此意的同义替换，其中security checks是原文security procedures的同义替换，故B项正确。
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