2. Those who have visited the Grand Canyon have typically seen layers of sediment in the gaping canyon, with different colors that mark the passage of time like the rings in a tree trunk.
(A) seen layers of sediment in the gaping canyon, with different colors that mark
(B) see layers of sediment in the gaping canyon, whose different colors mark
(C) been seeing layers of sediment in the gaping canyon, whose different colors are markers of
(D) been able to see layers of sediment in the gaping canyon, with different colors marking
(E) seen layers of sediment in the gaping canyon, marking by different colors
该题存在2中看法：
看法1. 答案是A: 一位NN说最近 在Kaplan gmat 800 上看到 此题，答案是 A ，解释是The key to getting the right answer for this question is recognizing that the underlined portion of the sentence should not contain pronoun. The answer choices give you the option of replacing with different colors with whose different colors but the second option is wrong because, if you added whose, it could refer to the layers or the Canon, and whenever a pronoun has more than one possible antecedent (the thing it refer to), it's used incorrectly. Eliminate (B) and (C). (A) is correct.. Eliminate (E) as well because the subject of "marking" is similarly unclear; is it the layer or the Canyon this is marking the passage of time? And (A) is better than (D) because, once again, seen is better than the wordier alternative been able to see. (A) is correct.
看法2.答案是应该还是D：A的with短语有问题，做状语不好理解，作定语也不好理解。D的with短语结构相当于独立主格结构，避免了A的尴尬。 marking 是个现在分词，这个with结构和独立主格起同样的作用，在这里表原因。将这个结构还原 because colors mark the passage of time like the rings. 注意，标准书面语中，独立主格不仅仅表示伴随，还可以表示时间，原因，条件，结果等等，根据情况而定。只有D是相当于独立主格的with结构，D：with different colors marking the passage去掉修饰成分：（with）color marking the passage。A是什么：with different colors that mark the passage去掉修饰成分：（with）different colors。看不懂
with结构没有用逗号与N.隔开时可以做定语：We went into a large waiting room with a large fan spinning overhead.
可是我今天无意间看见这题： S9-21:
From the bark of the paper birch tree the Menomini crafted a canoe about twenty feet long and two feet wide, with small ribs and rails of cedar, which could carry four persons or eight hundred pounds of (E) baggage yet was so light that a person could easily portage it around impeding rapids.
这里的a canoe about twenty feet long and two feet wide, with small ribs and rails of cedar就是上题的A的结构啊：N，with ＋ n，作定语表示前面的N的特征。
这样看天山2的A和D在语法上都成立，而且D还擅自加如了be able ro 的情态，可见A是唯一的答案了，是吗？望NN们指正～～ | 
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发表于 2004-8-4 15:15:00
