单选题
One Good Reason to Let Smallpox Live

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 1980, 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?
(51) reality, of course, it was naive to (52) that everyone would let (53) of such a potent potential weapon. 1 Undoubtedly several nations still have (54) vials. (55) the last "official" stocks of live virus bred mistrust of the US and Russia, (56) no obvious gain.
Now American researchers have (57) an animal model of the human disease, opening the (58) for tests on new treatments and vaccines. So one again there's a good reason to (59) the virus-just in (60) the disease puts in a reappearance.
How do we (61) with the mistrust of the US and Russia? (62) Keep the virus (63) 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 (64) the idea is wrong. If the virus (65) useful, the let's make it the servant of all humanity—not just a part of it.

单选题 A. In B. On C. At D. For
【正确答案】 A
【答案解析】in reality：“实际上，事实上”。这是固定的说法。
单选题 A. know B. imagine C. realize D. be aware
【正确答案】 B
【答案解析】此处应填入一个非事实性动词。imagine是非事实性动词。know, realize和be aware都是事实性动词，所以不合适。属于非事实性动词还有believe，think等。
单选题 A. to go B. going C. go D. went
【正确答案】 C
【答案解析】let跟动词原形，go符合这一原则。
单选题 A. much B. more C. most D. a few
【正确答案】 D
【答案解析】vials是复数，much不合适。另外，本句和上文都没有比较的意思，因此more和most也都不合适。
单选题 A. And B. While C. Whereas D. Although
【正确答案】 A
【答案解析】上一句句末的标点符号表明本句是一个独立的句子。只有and可用于一个独立的句子，其他的选项都不可以。
单选题 A. since B. for C. because D. of
【正确答案】 B
【答案解析】整个句子说的是美俄“官方”保存的最后的活病毒储备由于不能带来明显的好处而引起大家对这两个国家的不信任。no obvious gain是名词短语。for可跟名词短语，表示原因。because不是名词短语。since可跟名词短语，但跟表示时间的名词短语。of可跟名词短语，但表示“所属”关系。
单选题 A. looked for B. sought C. found D. talked about
【正确答案】 C
【答案解析】opening the way for tests on new treatments and vaccines：“为试验新的治疗方法和新的疫苗开辟了道路”。这是句子的下半部分。可以看出，上半部分所描写的：model应该是实际上存在的。此处应该用found。它是外延动词，表示model是存在的。looked for和sought是内涵动词。它们引起的名词短语并不一定有外延。因此是不合适的。talked about是“谈论”的意思。用在这里，也是不妥的。
单选题 A. method B. road C. street D. way
【正确答案】 D
【答案解析】open the way是一种固定的说法，意思是“为某事的发生创造了条件”。类似的说法还有：clear the way，prepare the way等。
单选题 A. keep B. put C. destroy D. eradicate
【正确答案】 A
【答案解析】keep the virus是“保存病毒”的意思。put the virus是不正确的，后面必须有地点状语。如：You can put the virus in a bottle. destroy the virus和eradicate the virus都是“消灭病毒”的意思，跟后半句话在是矛盾的。
单选题 A. need B. case C. necessity D. time
【正确答案】 B
【答案解析】in case是固定的说法，意思是“万一”。整个句子说的是：因此，又有了一个保存病毒的理由——万一这种病卷土重来。
单选题 A. handle B. tackle C. deal D. treat
【正确答案】 C
【答案解析】这几个选项意思差不多，但只有deal可跟with搭配。
单选题 A. Difficult B. Hard C. Safe D. Simple
【正确答案】 D
【答案解析】从紧随其后的句子来看，用simple是正确的。difficult，hard和safe都跟后面的句子在意思上不连续。
单选题 A. under B. in C. on D. for
【正确答案】 A
【答案解析】under the auspices是固定的说法，意思是“赞同”、“支持”。
单选题 A. say B. mean C. state D. declare
【正确答案】 B
【答案解析】It doesn't mean that...是一种固定的表达法。也可以说：It doesn't mean to say that…
单选题 A. will be B. would be C. is D. are
【正确答案】 C
【答案解析】本句是个条件句。从句中动词一般用现在时表示“未来”。这就排除了will be和would be。virus是单数，因此D也不正确。