阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，并涂在答题卡相应的位置上。 1、 One Good Reason to Let Smallpox LiveIt’s now a fair bet that we will never see the total extinctionof the smallpox virus. The idea was to cap the glorious achievement of 1 980，when smallpox was eradicated in the wild，bydestroying the killer virus in the last two labs that are supposed to have it-- one in the US and one in Russia? If smallpox had truly gone from the planet，what point Was there in keeping these reserves?__1__reality，of course，it was naive to __2 __ that everyone would let __3__ ofsuch a potent potentialweapon.‘ Undoubtedly several nations still have__4__ vials. __5__ the last“ official” stocks of live virus bred mistrust of the US and Russia,__6__ no obvious gain.Now American researchers have __7__ an animal model of the humandisease,opening the __8__for tests onnew treatments and vaccines. So once again there’s a good reason to__9__ thevirus--just in __10__ the disease puts in a reappearance.How do we __11__ with the mistrust of the US and Russia? __12__.Keep the virus __13__ international auspices in awell-guarded UN laboratory that’s open to all countries. The US willobject，of course，just as itrejects a multilateral approach to just about everything. But it doesn’t__14__the idea is wrong. If the virus __15__ useful，thenlet’s make it the servant of all humanity——not just a part of it.词汇：smallpox n.天花vial n.小瓶A.uspices n.赞助;支持C.ap vt.结束;覆盖potent adj.有效力的;强有力的mistrust n.不信任，怀疑
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