新prep2-197（GWD-1-Q16）和新prep2-198（GWD-18-Q31）共同的新问题点

genius_ivan

我有些不明白9楼说的为什么不能用it指代，指代很清晰阿，就是the global economy.

that,those这些是不能直接做主语的

figoliuxi

我记得做过几个题目,it都只能固定指代以前出现的那个noun,也就是economic~~~,但10000年前的economic~~~就不能用it指代了..所以这儿我觉得有指代的歧异撒..

最典型的例子就是OG上那个地震的题,说加州的地震和n年前的地震差别很大,后面那个地震OG特别说不能用it指代.(MS是这样哈)

199. Because the Earth's crust is more solid there and thus better able to transmit shock waves, an earthquake

of a given magnitude typically devastates an area 100 times greater in the eastern United States than it

does in the West.

(A) of a given magnitude typically devastates an area 100 times greater in the eastern United States than it

does in the West

(B) of a given magnitude will typically devastate 100 times the area if it occurs in the eastern United States

instead of the West

(C) will typically devastate 100 times the area in the eastern United States than one of comparable

magnitude occurring in the West

143

(D) in the eastern United States will typically devastate an area 100 times greater than will a quake of

comparable magnitude occurring in the West

(E) that occurs in the eastern United States will typically devastate 100 times more area than if it occurred

with comparable magnitude in the West

200. Certain pesticides can become ineffective if used

[此贴子已经被作者于2009/7/28 17:51:33编辑过]

fiona_hq

up

pwss

wittyhunter

比较结构的省略问题是effectiveness的问题，也就是省了好，不省也没事。不像虚拟语气中require that（should）这种必须省略的结构。这个it did是属于可以省略的，但不是必须省略的范围，省了显得简洁，不省强调对比。该题的其它选项都有明显错误，所以就选A了。如果还有一个选项其它部分都跟A一样，但是省了it did，就选那个，但GMAC是永远不会出类似的选项的，容易引起争议。

ny_915

197：后半句是一个同位语，a greater proportion和以前的proportion相比。但是前面的句子里没有proportion这个词，只有这个概念，因此用it就没有指代的东西。it要指代前面出现过的词。

198：A选项里的it指的就是the global economy，同一件事物时间前后的比较。假如比较对象换成“亚洲的economy和非洲的economy”比较，那么就用that of，不同事物的比较。复数时用those of。

另外这个题目的主语是global economy，BCDE选项的主语都换成了growth，改变了原句的意思，所以不选。

cougarhui

up

falconcn

197中，我觉得than后面补出比动词的时候，动词必须能够还原。

原句中的动词是account for，而than后面补出的动词是be，be不能够还原，所以A/C都是不正确的。

欢迎大家拍砖！

蚊子漫步

今天做到这题，对前面有人对什么时候用that的疑问
我的想法是，用it指代的 是前文提到的具体事物，用that的时候是出现与前文比较的同类事物，而不就是前文说的那个事物。。。。

有点绕，不知道这样理解对不对。。。。欢迎拍

Sharonluo33

you can't use 'that' in this sort of construction, because constructions using 'that of' (or other preposition after 'that') must have EXACTLY parallel structures. in other words, if the second half says 'that during 10,000 years', then the preceding half must say 'the growth of ___ during something else' (or some other time preposition, such as before or after, in place of during).

there's nothing ungrammatical about 'from when', because the clause starting with 'when' is a perfectly legitimate noun clause (i.e., 'when agriculture began' serves as a noun. however:
- it's possible that the gmat does consider such constructions wrong; the only way to tell is to see if they say so in any official answer choices
- regardless of where the gmat stands on the issue, 'the beginning of agriculture' is unquestionably better than 'when agriculture began' (i.e., an actual noun is almost always superior to a circuitous noun clause, when possible)