标题: that/those在比较中的问题，困扰很久！ [打印本页] 作者: ianwyb 时间: 2016-9-24 19:16 标题: that/those在比较中的问题，困扰很久！ 今天又做到了OG中的一道题， 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
答案显然是A，排除方法是通过后面的动词。但是看了OG的解释：‘The first part of this version of the sentence illogically compares prices to a time.’ LZ又纠结了，因为我记得以前大部分题目两个年代间价格或者别的比较都是直接用年代对比的，比如Helr在书中提到的：
Gas price were higher in 2002 than in 1992.
还有一些之前做到的题目好像也都是直接拿年代比较的。然后我去google了Manhattan的说法，很巧，也有人拿这句话问了，Ron也回答了：
both versions are fine.
i looked at the problem, and—just as i suspected—the choices with '...than a year ago' can be eliminated for other, quite straightforward, reasons.
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.)
但是gmatclub上面又说，这里Now和a year ago词性不同，不能对比。我觉得这个有点太死扣了，我理解的是价格和价格可以对比，时间轴和时间轴也可以对比，主要是看选项中别的方面来筛选答案。