What is the most important lesson of the WTC collapse？A．We should wear seat belts
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What is the most important lesson of the WTC collapse？
A．We should wear seat belts while driving.
B．We should build low buildings just as we should drive slowly.
C．We should make building tall buildings illegal.
D．We should pay for safety while constructing tall buildings.
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正确答案：D
解析：文章最后一段说，世贸大楼倒塌的最重要教训不是说我们不应该盖高层建筑，而是说我们错误估计了其成本。为了解释其含义，作者用汽车安全措施的使用历史为例，说明人吃一堑长一智的道理。