大家来讨论一道og指代题

lf19950708

The decline of the mountain yellow-legged frog in the high reaches of the Sierra Nevada has become severe enough for the United States Fish and Wildlife Service quite possibly to list it as an endangered species in the near future.

(A) severe enough for the United States Fish and Wildlife Service quite possibly to list it
(B) severe enough so that the United States Fish and Wildlife Service could well list them
(C) severe enough for it quite possibly to be listed by the United States Fish and Wildlife Service
(D) so severe that the United States Fish and Wildlife Service could well list it
(E) so severe that they could well be listed by the United States Fish and Wildlife Service
选D
it不是完全指代吗？应该指代the decline of  mountain yellow-legged frog啊？那岂不是就解释不合理了吗？the decline成了species

sunyuwei

注意这里的考点，所有选项里都出现了代词，it和them的区别说明考的是单复数的辨别，而且这里it指代frog完全说的通