求问OG 比较结构中的省略问题！！

蒸蒸大侠

各位大神新人来报到，求问两道OG上的代词指代题（我觉得应该是代词指代）

OG 16 90 里面

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 Soutg, and are hurting crops and therefore raising
d. as those of a year ago and are going down, even thought 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


这个题正确答案是 B，我知道这个题选B是因为平行 其他答案都错啦，但是B 中出现的those of 也应该是指代前文的prices, 也就是两个价格之间的比较

但是在OG 16 104里面

Heating-oil prices are expected to be higher this year than last becauese 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 last year.
b. Heaating-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 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 %5a barrel for crude oil more than they did.

这个题正确答案就选A 了，我知道这个题其他选项也都不对，但是A 不应该也是 than those of last year?
还跪请大神赐教！！！

cindyzhoulanbj

You can find some threads from below posts:

http://forum.chasedream.com/foru ... ead&tid=1239985