Historically, humans get serious about avoiding disasters only after one has just struck them. 62 that logic, 2006 should have been a breakthrough year for rational behavior. With the memory of 9/11 still 63 in their minds, Americans watched hurricane Katrina, the most expensive disaster in U.S. history, on 64 TV. Anyone who didnt know it before should have learned that bad things can happen. And they are made 65 worse by our willful blindness to risk as much as our 66 to work together before everything goes to hell.

　　Granted, some amount of delusionis probably part of the 67 condition. In A.D. 63, Pompeii was seriously damaged by an earthquake, and the locals immediately went to work 68, in the same spot-until they were buried altogether by a volcano eruption 16 years later. But a 69 of the past year in disaster history suggests that modern Americans are particularly bad at 70 themselves from guaranteed threats. We know more than we 71 did about the dangers we face. But it turns 72 that in times of crisis, our greatest enemy is 73 the storm, the quake or the 74 itself. More often it is ourselves.

　　B 62. A) To B) By C) On D) For

　　介词辨析。

　　通过对前句的分析理解，知道人性的本质-只有在遭受了痛苦之后才会重视痛苦，于是后句紧跟的连词应该是表示解释说明，而to为至于，on为在...上面，for为因果连词，只有by可以表示通过。

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