E：只说会与竞争者比较rates，以及会把costs和rates搞混，没有说会用costs计算竞争者的rates
注意看清楚rates还是costs

关注作者的态度
看直接相关的下一句的意思

qualify an assertion 限定这个断言
而不是反驳

并不一定不一致
Doesn't have to be inconsistent

如果N=5 N-1可以被2整除，但N+1不可以被4整除啊

Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow
=the rate at which trees grow is believed among the surest indications of sunspot cycles on Earth

circling作定语修饰planets，和先行词被插入语隔开。从语意来讲circle也不会修饰Jupiter，一个Jupiter怎么围绕其他所有的stars啊。
Astronomers have detected more than 80 massive planets circling other stars. / (planets) which circle other stars.

1. North America不包括在overseas里！公司在海外盈利在本国亏损，而海外的盈利都被用来支付tax了
2. The computer company registered a $16 million net loss for the year, largely because it was profitable only overseas, while it continued to lose money in North America.

D:
**had done: as long as there's something to serve as the second past time marker - to which the action referenced in the past perfect is relevant - you can use the past perfect (Ron).
**comparison: subject vs subject: magazines vs individuals -> not strictly comparable

by no single yardstick can all distances be measured=all distances can be measured by no single yardstick=all distances cannot be measured by a single yardstick->meaning twisted and illogical: "not" negate "all". Apparently at least one distance can be measured by a single yardstick.

“A leading figure in the Scottish Enlightenment是同位语，显然应该是修饰一个人的，而不是“书”，”

A is to B what C is to D中的what用作连接代词。它既是前而is的表语，又是后而is的表语。"A is to B what C is to D”常译为“A之于B犹如C之于D"。

本题主要考点是 between 1876 and 1904的修饰对象，逻辑上应该是construction比较合适。
就近修饰

so...as to... : same subject
so...that (sentence): sentence usaully has a different subject.

economic shifts are unable to be distinguished doesn't make sense

While the red portion is intended to modify defused (expressing how the CED defused a situation), a reader might construe that the red portion is serving to modify the portion in blue (expressing why the situation was tense).
Also, it is not crystal clear whether her refers to Smith or to the CEO.
https://gmatclub.com/forum/although-some-had-accused-smith-the-firm-s-network-manager-of-neglig-294385.html

as is differently used than as__ as__ and more/less__ than__. While using as__ as__ and more/less__ than__ you can omit units, verbs, and even whole clauses from the second term if there is no ambiguity,
Linking arrangements... evolved as fast in the United States as (they did) in most other developed countries.

https://gmatclub.com/forum/linking-arrangements-among-secondary-schools-and-the-workplace-never-294390.html

独立主格结构，当从句主语和主句主语不一致时（workers =/ industry)，用名词+分词短语形式表达。E中worker和employ的关系是被动，故用employed。with可去掉。
错选C，have been done时态不对，主从句是同时发生。

it was ... that ... and it was ... that ...

还是考的语意：
A/E：it 做形式主语，有强调的意思，A，强调是凯瑟琳变成发行人后华盛顿邮报才进入第一梯队，强调是在凯瑟琳的命令下，这份报纸才因为报道水门事件获得了极高的评价。A句凯瑟琳是句子语意的中心；E，华盛顿邮报获得了高的评价，语意中心是华盛顿邮报。
这里应该是强调凯瑟琳的作用，在凯瑟琳来之前，这份报纸屁都不是，凯瑟琳来了以后，它又是进入第一梯队，又是报道水门事件获得表扬啥啥的，如咸鱼翻身啊～～