lower这句修饰an annual per capital income,形容词省略结构 1. 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 可参照这题 common的用法 |