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
答案木有问题，是D。我就想问问，这个D中的it，prep笔记的的解释是it指代mountain yellow-legged frog;
但是为什么不会产生指代decline的歧义呢？我之所以会有这个问题是因为og12 的78题，如下：
og12 78Fossils of the arm of a sloth found in puerto tico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles Islands.
A) sloth found in Puerto Rico in 1991, and dated at 34 million years old ,made it the earliest known mammal of
D)sloth,found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
答案是D，A错的原因是it只能指代fossils，非sloth，因为显然fossils是这个所有格结构中的核心词。所以在后文中要重述一次。大家不觉得很奇怪么？在这个地方fossils是复数，sloth是单数，用it指代会产生的歧义程度显然没有前一题decline和frog都是单数造成的歧义大。但是在og里面都是不允许的，为什么在prep里面又没有这样的混乱了呢？请大侠NN斑竹啥的帮忙看看吧。谢谢了。 | 
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发表于 2010-7-22 12:12:08
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