关于比较对象的两道题 求解答 觉得矛盾

玛德滞涨

GWD
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  分析A选项
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  分析B选项
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  分析C选项
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  分析D选项
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  分析E选项
这里的those of 为什么不能省略呢
看成两个是状语的比较
选B


而OG这一题为什么又可以省略呢
93、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.
(A)    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
(B)    Heating-oil prices are expected to rise higher this year over last because refiners pay about $5 a barrel for crude oil more than they did
(C)    Expectations are for heating-oil prices to be higher this year than last year’s because refiners are paying about $5 a barrel for crude oil more than they did
(D)    It is the expectation that heating-oil prices will be higher for this year over last because refiners are paying about $5 a barrel more for crude oil now than what they were
(E)    It is expected that heating-oil prices will rise higher this year than last year’s because refiners pay about $5 a barrel for crude oil more than they did
这里选A

西域小狼

之前回答过这个问题　但是不知道是否正确　
第一个例子now 是副词　与一般的时间状语有区别　如果改成　Prices at the producer level are only 1.3 percent higher this year than a year ago. 就应该是正确的

第二句话第一是省略了year 因为不引起歧义　第二比较对象都有相应的状语结构　所以正确

玛德滞涨

再顶一下 谢谢楼上答复 还有其他吗

医生吃鱼

楼主提了个好问题！为了不误人子弟，我是引用曼哈顿论坛的讨论。

RON认为第一题的A选项中的比较结构是正确的，即比较时间状语“now”和a year ago“。
该选项的错误在与后半句的”raised“。
原帖链接：http://www.manhattanprep.com/gmat/forums/post117480.html#p117480

玛德滞涨

医生吃鱼 发表于 2016-3-19 17:59
楼主提了个好问题！为了不误人子弟，我是引用曼哈顿论坛的讨论。

RON认为第一题的A选项中的比较结构是正确 ...

谢谢！同意！

echizenlover

医生吃鱼 发表于 2016-3-19 17:59
楼主提了个好问题！为了不误人子弟，我是引用曼哈顿论坛的讨论。

RON认为第一题的A选项中的比较结构是正确 ...

感谢 ！刚好在困惑这两道题！

rustraff

据说编OG和编答案的不是一伙人!

MAYG12345

RON原话：

don't forget—the OG answer keys are usually incomplete, and often incorrect.
the official PROBLEMS are essentially flawless, but the official answer keys are not. (GMAC's all-stars, the people who write the problems, do not write the answer keys; GMAC 'outsources' that work to people of lesser talent, presumably to cut costs.)

笑哭