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  3. "In the long run," as John Maynard Keynes observed, "we are all dead. " True. But can the【1】run be elongated in a way that makes

"In the long run," as John Maynard Keynes observed, "we are all dead. " True. But can the【1】run be elongated in a way that makes

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问题     "In the long run," as John Maynard Keynes observed, "we are all dead. " True. But can the【1】run be elongated in a way that makes the long run【2】? And if so, how, and at what cost? People have dreamt of【3】since time immemorial. They have sought it since the first alchemist put an elixir of【4】on the same shopping list as a way to turn lead into gold. They have【5】about it in fiction, from Rider Haggard’s "She" to Frank Herbert’s "Dune". And now, with the growth of【6】knowledge that has marked the past few decades, a few researchers believe it might be within【7】.  
    To think about the question, it is important to understand why organisms-people【8】-age in the first place. People are like machines: they【9】That much is obvious. However, a machine can always be【10】A good mechanic with a stock of spare parts can keep it going【11】. Eventually, no part of the【12】may remain, but it still carries on, like Lincoln’s famous axe that had three new handles and two new blade.  
    The question, of course, is whether the machine is worth【13】. It is here that people and nature【14】. Or, to put it slightly【15】, two bits of nature disagree with each other. From the individual’s point of view,【16】is an imperative. You cannot reproduce unless you are alive. A fear of death is a sensible evolved response and, since【17】is a sure way of dying, it is no surprise that people want to stop it in its tracks. Moreover, even the appearance of ageing can be【18】. It【19】the range of potential sexual partners who find you attractive-since it is a sign that you are not going to be【20】all that long to help bring up baby-and thus, again, curbs your reproduction.
选项 A、replacing
B、repairing
C、buying
D、upgrading
答案B
解析 前一段说了机器的修理，那么自然而然的问题就应该是这个机器是否值得修理。故选择repairing。   
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