囧哥做语法70
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
(E) the numbers of the black-footed ferret are thought to have declined as
考察修饰
形容词短语放开头，要有一个明确的主语，可以处于这样的状态.
A 正确，因为black-footed ferrets可以common throughout the plains
B.不对，主语不明确，是it
C.主语decline无法common..
D.主语是一个从句，和形容词短语不一致
E.numbers不能common..
技巧：划线部分中主语的改变往往考察修饰成分和逻辑主语是否一致的考点。
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