OG16 SC90 比较

violet468118034

90. Prices at the producer level are only 1.3 percent higher now than a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raised corn and soybean prices.
(A) than a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raised
(B) than those of a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raising
(C) than a year ago and are going down, despite floods in the Midwest and drought in the South, and are hurting crops and therefore raising
(D) as those of a year ago and are going down, even though floods in the Midwest and drought in the South hurt crops and therefore raise
(E) as they were a year ago and are going down, despite floods in the Midwest and drought in the South, and are hurting crops and therefore raising


答案是B选项，我也根据语义的方面弄明白这个选项了。
但是我想知道为什么这里的A C中的than a year ago不行呢？我直接比较状语不行么，now和 a year ago相比？求各位NN解答~

Nievesma

我也正在看这道题，我认为A和C前半部分也是正确的（比如OG16 104题 Heating-oil prices are expected to be higher this year than last）。我找到了Ron关于此题的解释https://www.manhattanprep.com/gmat/forums/the-word-omitted-in-comparison-t32362.html，他肯定了A和C中的前半部分的结构是可以的，排除C是靠其第二部分的错误，OG关于C前半部分错误比较Price和 a year ago 是不正确的，送给同样纠结此题的小伙伴~

virnnie

104. Heating-oil prices are expected to be higher this year than last because refiners are paying about $5 a barrel more for crude oil than they were last year.

这里说heating-oil prices are expected to be higher this year than last year's 是错的。说是this year与last year比较才对。但是不能理解成主语比较吗？

骡子桑

刘琳0411 发表于 2015-10-7 09:50
你好！我做prep07时发现了这样一个句子，想请教你一下。第83题。谢谢

Stock levels for dom ...

这不是主语比较吗？stock levels for domestic crude oil(now) ---  (stock levels for domestic crude oil) in the past years

刘琳0411

骡子桑 发表于 2015-9-28 13:48
Prices at the producer level are only 1.3 percent higher now than a year ago.这道题要从其他选项来判 ...

你好！我做prep07时发现了这样一个句子，想请教你一下。第83题。谢谢

Stock levels for domestic crude oil are far lower than in past years, leaving domestic oil prices vulnerable to any hints of oil supply disruptions in the Middle East or any unexpected growth in consumer demand that might be prompted by colder-than-normal temperatures.

题中划线部分是leaving之后。 我的疑问是关于未划线部分Stock levels for domestic crude oil are far lower than in past years...

这里的than in past years前面没有相应的状语结构，可以省略(they were) in past years 吗？

骡子桑

Prices at the producer level are only 1.3 percent higher now than a year ago.这道题要从其他选项来判断正误，单独这句话完全没有问题。详细可以看一下ron的这个帖子
https://www.manhattanprep.com/gmat/forums/the-word-omitted-in-comparison-t32362.html

比如这题：
Prices at the producer level are only 1.3 percent higher now than a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raised corn and soybean prices.
A. than a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raised  
B. than those of a year ago and are going down, even though floods in the Midwest and drought in the South are hurting crops and therefore raising  
C. than a year ago and are going down, despite floods in the Midwest and drought in the South. and are hurting crops and therefore raising  
D. as those of a year ago and are going down, even though floods in the Midwest and drought in the South hurt crops and therefore raise  
E. as they were a year ago and are going down, despite floods in the Midwest and drought in the South, and are hurting crops and therefore raising
个人分析：
A:than前面有时间状语now，这是一个时间状语的比较，后面直接跟a year ago是完全可以的。主要错误在与句末therefore raised的时态错误，表面raised Corn 和soybean prices事件发生在floods hurt crops之前，逻辑错误。
B.加了those of使得句子更加清晰，但是就如A那样，因为不涉及歧义完全可以省略。另外这句后半句逻辑正确
C.错误在despite后面的后面跟了一个句号，使得and引导的句子不完整
D.as与higher一起使用搭配是错误的，后半句一般现在时表达通常情况，是可以接受的
E.as与higher一起使用搭配是错误的，后半句错误同C

好答案一定是比较出来的，还是那句话，语言本来就没有四海皆可的标准

但是要有大判断的原则，就状语比较来言，尤其是时间状语：

**时间状语的比较，能否省略取决于than前面是否有相应的时间状语。有的话，than后面主句可以省略；没有的话，than后面需要补出主谓，以避免比较对象上的歧义。

To develop more accurate population forecasts, demographers would have to know a great deal more than（they do） now about the social and economic determinants of fertility.   

[they do]不能省略，因为than前面没有相应的状语结构

A large rise in the number of housing starts in the coming year should boost new construction dollars by several billion dollars, making the construction industry’s economic health much more robust than (it was) five years ago.

[it was]不能省略，因为than前面没有相应的状语结构

Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than in any previous election.

[in any previous election]前面没有补出[that]，因为than前面有1992与in any previous year相对应。

来自这位同学总结的 http://forum.chasedream.com/thread-784791-1-1.html

Arlenerong

骡子桑 发表于 2015-8-18 18:24
比较只有以下这些形式，没有直接比较时间状语这样的形式，因为它比较的是在不同时间下的相同事物，但是事物 ...

不好意思，借地方问一个问题，也是关于这个问题的。
因为OG16 SC104的正确句子是Heating-oil prices are expected to be higher this year than last.
这里than后面省略了相同的heating-oil prices were，我觉得这样是可以理解的。
但是很明显跟这个Prices at the producer level are only 1.3 percent higher now than a year ago.结构很类似，X is _er than Y.
但这里却必须要加those of
能解释一下为什么两个句子会有明显差异吗？

可心IvyFeng

骡子桑 发表于 2015-8-19 11:09
D是对的，我觉得你的理解很好啊。其实我做的时候做错了...
我正好做到这道题，是因我觉得这道题就是SC做 ...

感谢各种耐心解答~~~感觉有时候还是晕晕的，有题目我再贴上来问~~感谢！！

violet468118034

骡子桑 发表于 2015-8-19 16:13
还是状语比较
suppliers are growing fish as fast as fish grow naturally

明白了！谢谢耐心的讲解！

骡子桑

violet468118034 发表于 2015-8-19 13:21
我选c吧
我的思路是这样的：
1.划线部分逗号之后应该表示结果，所以用-ing形式，同时又能够和划线外的rais ...

还是状语比较
suppliers are growing fish as fast as fish grow naturally