问了这么多题，都不知道写清楚题号的，惭愧~~~~ 以后一定改正
A distemper virus has caused two-thirds of the seal population in the North Sea to die since May 1988. The explanation for the deaths cannot rest here, however. There must be a reason the normally latent virus could prevail so suddenly: clearly the severe pollution of the North Sea waters must have weakened the immune system of the seals so that they could no longer withstand the virus.
11. Which one of the following, if true, most strongly supports the explanation given in the argument?
(A) At various times during the last ten years, several species of shellfish and seabirds in the North Sea have experienced unprecedented steep drops in population.
(B) By reducing pollution at its source, Northern Europe and Scandinavia have been taking the lead in preventing pollution from reaching the waters of the North Sea.
(C) For many years, fish for human consumption have been taken from the waters of the North Sea.
(D) There are two species of seal found throughout the North Sea area, the common seal and the gray seal.
(E) The distemper caused by the virus was a disease that was new to the population of North Sea seals in May 1988, and so the seals’ immune systems were unprepared to counter it.
答案给的是A
这道题第一遍看下来，发现没答案。E应该是起削弱作用吧。答案A想想说服自己的唯一理由就是：另外两种生物的数量下降为severe pollution的存在提供了佐证，但还是有点儿牵强啊。但其他选项更没边儿。crusoe大牛快现身吧~~
当读到A的时候，很高兴地发现A是加强，但想到题目问的是most strongly supports ，我就琢磨是不是还有更适合的题支（这里我们知道最强的加强，就是直接对原文观点表示赞成），结果很令人失望，因此，本题还不是那种有若干选项都表加强，要你选哪个是最直接最有力的加强（这种题目似乎非常罕见）。
至于E选项，(E) The distemper caused by the virus ... 很明显大部分是一个对the virus解释的定语从句，题目并不是问的内容与病毒什么无关，做题抓的内容为The explanation for the deaths cannot rest here（对于这种死亡尚缺乏解释性的证据，rest就是“提出证据”的意思），只要找到有力的证据即可，而A正好是题干中孜孜以求的The explanation for the deaths，虽然间接点，但也是加强。
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