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题库 / Prep2007E1-SC-94
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.
severe enough for the United States Fish and Wildlife Service quite possibly to list it
severe enough so that the United States Fish and Wildlife Service could well list them
severe enough for it quite possibly to be listed by the United States Fish and Wildlife Service
so severe that the United States Fish and Wildlife Service could well list it
so severe that they could well be listed by the United States Fish and Wildlife Service
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主客观问题，如果是enough for sb to do ,应该是可以的，但是这里的机构应该是按照客观规定来运作，下降到某个列入名单的客观标准后才能进行List，所以使用从句客观性比较强
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