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题库 / OG2016-SC-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.
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
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
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
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
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
题目分析：
略。
选项分析：
A选项：比较对象不对等。本题想比较的不是两个年份，而是两个年份的价格。检查本选项最合理的比较对象可知，我们真正应该比较的是“现在的价格”和“一年前的价格”。如果只用now，相当于比较的是“一年前的情况”和“现在的情况”，这是不对的。因为“价格的情况”和“价格”是不同的，只有价格才能higher（高低），价格的其它情况或者属性是没有高低之分的。
B选项：Correct. 本选项在逻辑和语法上均是正确的。
C选项：比较对象错误同(A)。
D选项：higher+than是习惯表达，不能加as。
E选项：本选项错误同(D)。
ab比较感觉都可以 不是主要考点 应该根据时态排除肯定错的
A的比较是可以的，因为前半句中出现了NOW可以和A year ago 做对比，如果没有now就不行。 很明显A错在rasied的时态上。这个老师。。。简直是在乱讲
A,B,C的比较都是对的；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.)
考察
前：其实ab的比较对象方式都是可以接受的，所以这不是致命的排除点；more than 排除de
后：时态，are hurting and therefore raising，是在实时发生的，raising是正确的，并列也正确b对
同意
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老师，在您的书P88 的例句中 “Gas prices were higher in 2002 than in 1992” 的解释里提到 虽然这比较的是两个时期的油价，但也可以比较两个时期汽油价格的情况，所以in 1992可以算作是比较的部分。
1. there's nothing wrong with the parallelism in the front of A or C either (Ron)
2. "raising" is ongoing while "raised" done. The former makes more sense.
比较对象没问题的。 比较状语从句是完整的句子，所以A选项than右边是a year ago，把主谓补充完整就是Prices at the producer level are only 1.3 percent higher now than prices at the producer level are a year ago. 完全没问题。 A选项错误是后半句 are hurting and therefore raised。两个动作hurt跟raise之间如果没有明显的时间状语的改变，时态就要一致。 逻辑上来说，洪水干旱一直伤害着农作物，所以（and therefore）价格上升停止了（raised过去式表示已经结束），逻辑说不通。
请问这里的than a year ago可以理解为省略了prices at producer level吗
虽然og上也这么说，但是还是不理解为什么A的比较不对，通过时态判断选B吧。
出现系动词的比较，比较的是主语
不是系动词的主语，比较的是宾补
自己总结的...不一定对啊兄弟们
C选项and are hurting crops and therefore raising主语为prices不对
higher+than是习惯表达，不能加as。
https://gmatclub.com/forum/prices-at-the-producer-level-are-only-1-3-percent-higher-now-than-a-206127.html
注意A中不是省略，而是确实是比较了两个年份，导致比较的对象错了。
sc
看题的时候完全没看句意啊，错选了c又。。谁hurting crops？
比较对象没错，A时态错了
C，despite+名词，介宾结构做状语=though/although+句子，and are hurting crops and therefore raising prices的主语是prices，错误！
前后整个句子的不同点都要好好看
and连接两个不相关的平行对象，and therefore连接两个有因果关系的平行对象
又一次被those of坑了，直接跳过B觉得C是对的，也没注意到C里藏了个and
不要用三脚猫的语法水平去给选项挑错！读句子时用化成分来辅助理解句子结构和语意。