大全Section11-26 讨论汇总里没有- 求助

26.  Once common throughout the Western plains, black-footed ferrets are thought to have declined in number as a result of the poisoning of prairie dogs, their prey.

(A) black-footed ferrets are thought to have declined in number as

(B) it is thought that the decline in number of black-footed ferrets is

(C) the decline in the number of black-footed ferrets is thought of as

(D) that black-footed ferrets have declined in their numbers is thought to be（A）

(E) the numbers of the black-footed ferret are thought to have declined as

看这个题目，是因为在整理复习XDF的笔记，其中，上面的26题是XDF补充题目P323的No.138题，

XDF老师，就是表演钢管舞的那个。。：） 说这个题目是形容词省略结构前置，后面句子的逻辑主语应该与其一致，或者说前置的部分应该可以对后面的主语进行修饰；

但是，怎么看，都不知道上面黄色标出部分是省略了什么？是形容词省略？？？？？

很晕，搞不明白了。。。请斑竹和各位NN出来讲讲。。。

谢谢啦。。。。。课堂笔记没有做好，真是不好意思。。。

没有省略的话，应该是：Black-footed ferrets were once common throughout the Western plains