答案与题解：
1. 文章标题分析：One Good Reason to Let Smallpox Live
It’s now a fair (= reasonable/合理的)bet that we will never see the total extinction of the smallpox virus.(点题：与标题所反映的内容一致)The idea was to cap the glorious achievement of 1 980，when smallpox was eradicated in the wild，by destroying 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__ of
such a potent potential weapon.‘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 human disease，
opening the __8__for tests on new treatments and vaccines.So once again there’s a good reason to__9__ the virus--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 a well-guarded UN laboratory that’s open to all countries.The US will object，of course，just as it rejects a multilateral approach to just about everything.But it doesn’t __14__the idea is wrong.If the virus __15__ useful，then let’s make it the servant of all humanity――not just a part of it(回应文章主题。)
2. 直接解题：
It’s now a fair bet that we will never see the total extinction of the smallpox virus.
The idea was to cap the glorious achievement of 1 980，when smallpox was eradicated (= eliminate/remove/消除，根除)in the wild，by destroying the killer virus in the last two labs that are supposed to have it -- one in the US and one in Russia?
When 引导定语从句，对前面的时间词1 980进行说明。
If smallpox had truly gone from the planet，what point was there in keeping these reserves?
Point in doing …/做…的意义
e.g. what is the point of arguing with them?
1. A) In B) On C) At D)For
2. A)know B) imagine C) realize D)be aware
3. A)to go B) going C) go D) went
__1__reality，of course，it was naive (adj.天真的)to __2 __ that everyone would let __3__ of such a potent potential weapon.
1. A.分析：被选项是介词，注意搭配结构。in reality“实际上，事实上”是固定搭配使用的说法。
2. B. 分析：借助被选项的特点： know = be aware，排除A和D，再借助搭配结构(..是天真的)判断B(想象)是答案。
3. C. 分析：1et跟原形动词，go符合这一原则。
4. A) much B) more C) most D) a few
‘Undoubtedly several nations still have__4__ vials(小瓶).
4. D.分析：根据搭配结构--..小瓶，判断D最合适(而且该句和前句中都没有出现比较的含义)
5. A)And B) While C) Whereas D) Although
6. A)since B) for C) because D) of
__5__ the last“official”stocks of live virus bred mistrust of the US and Russia，__6__ no obvious gain.
5. A.分析：该句结构是“句子 短语结构”，因此空格5处的连词必须能引导一个独立的句子，这样判断只有A合适(其他选项都只能引导从句结构)
6. B.分析：借助被选项的特点B和C相关，用法不同，重点注意，再借助空格后是名词性结构这个特点判断B合适。