OG10 183 看了所有帖子实在不明白

confetti0515

 请教：og183

183. Archaeologists in Ireland believe that a recently discovered chalice, which dates from the eighth century, was probably buried to keep from being stolen by invaders.

(A) to keep from

(B) to keep it from

(C) to avoid

(D) in order that it would avoid（B）

(E) in order to keep from

In choice A, the phrase from
            being stolen lacks the necessary noun or pronoun that specifies what it is that might be stolen. Choice B is best because it provides the pronoun it, which refers to chalice. Like choice A, choices C and E lack the pronoun. D is wordy and askward in its use of the passive vocie. Moreover, avoid is used imprecisely in C and D because it illogically suggests that the chalice is acting to prevent its own theft. 

看了所有的帖子，还是不明白为什么A不对，老是觉得B的it多余重复，使句子结构不完整。因为此句的that从句应该是一个主谓完整，只有一套主谓的句子才对啊。

我看对it结构不清晰的帖子也有，还有人举例：

..., one that took sb ...years to sort it out.  这里it和one指代同一个，答案删除了it.

我自己也做过一个题目是说one building...., took sb ...years to complete it. 这里的it答案也删除了 。

有没有NN可以从句子结构而不是从代词更清晰的知道谁被偷了这样的句子意思来解释呢？谢谢了！

greatbusy

我不是NN，但试着回答你的问题，

你要看整个句子的逻辑意思，要是没有这个it的话，这句话就不完整了，keep what from being stolen by invaders? 你要思考这个问题。
还有，在GMAT的SC题中是有很多的题说明it是多余的，必须要去掉，但是这道替必须要有it才对的。其实在做GMAT SC的时候你要具体问题具体分析。在GMAT SC中，你要记住逻辑合理是第一。

confetti0515

谢谢阿，明白，意思上完全明白了，可是结构上呢，这个it做什么结构呢

alohabrian

加it是为了，突出keep的逻辑主语不是 chalice而是其他人。

原句本来的结构：chalice was buried to keep from就很不好，先主动后被动。语法上 keep 的主语也是chalice，但是chalice不能自己keep from being stolen.

应该是 Someone bury the chalice to keep it from....变成被动就是 B。

confetti0515

哦，恍然大悟了，语法上 keep 的主语也是chalice，但是chalice不能自己keep from being stolen！！！

多谢阿

crystal007

为什么C不对呢？

confetti0515

说avoid有主观避免的意思，用于有生命的