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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、around
B、helpful
C、with
D、together
答案A
解析 前述的条件是衰老了，也就意味着生存的时间可能会比对方短。那么以此为前提结合选项判断，C项只有with，后面未接任何名词，在语法上不正确，故可以首先排除。D项together也属于语义不完全，应当是going to be together with…，together不作表语使用，故也排除。然后再看helpful，如果此处选择helpful，而后面又有to help bring up，则有重复之嫌，故around为最佳答案。around，存在的，活着的。   
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