A错是因为有歧义吧

老师，“简化的定语从句“和“伴随状语”的区分是不是靠句意？因为这句我没看句意直接理解成了伴随，所以选错了。。。

Similarly, the wrong answer (D) seems to imply that EACH country is somehow as 'varied' as EACH other country. That's not the intended meaning, which is that the SET of countries is varied.

If I'm in San Francisco, then sentence #2 means, strangely enough, that I get mail from cities that are all exactly 3,082 miles away (the distance from SF to Providence). Sentence #1 implies no such thing.

There's a very subtle difference in meaning, although Stacey is correct that the main issue is that of redundancy/wordiness. But consider the difference between these two sentences, which would illustrate the point:
(1) I get mail from cities as far away as Providence.
(2) I get mail from cities that are as far away as Providence.

C选项是错在automobile-related jobs的复数么

差点选C

even if the problem said "... each a product of its regional influences", it would still be wrong.

"Regional influences" are vague forces—basically, like the culinary culture of an entire geographical area. These forces don't emanate from, or belong to, any particular person or thing, so it's impossible for any construction of the form "its/their/____'s influences" to make sense here.

这里的then和later连用应该算是redundancy吧？

作为 secretary of labor的逻辑主语必须是人，也就是Frances Perkins，直接排除掉ABCE

Twice做限定语，后面直接加数量类的名词 Twice that number
不能选DE， 是因为从前文推不出来Truck有多少量，所以何来Twice as many

主语是the bird 所以是单数，排除A&E
通过什么方式用by，而且我个人觉得如果用with可以引起歧义，因为可以和nest连接，排除A&B
as做“当”讲
D项and its flying 没有对象和其平行

B和L的不同原文从一开始就说了，但是没有说的那么明显，先是批评了B，说她little effort，那相反L就是more。

More importantly, she shows that the debate itself depends on frame of reference

我觉得我的脑回路也是清奇。犯错的原因正是因为我认为作者对比 P 和大众的想法，并指出 P 的想法是对的，所以 P 的例子就是来反证大众是错的。。。。

A: "enough for xxx to happen" is a threshold. this is going to be some EXACT boundary at which something starts to happen.
paired with "quite possibly", this creates a contradiction.

B选项中的their用法不对

不懂AC

看because of后面那么复杂就直接排除D了，，有毒

不定式表示的是一种“主观性”，即，表达一种状态的转换（start-stop）。
从句表示的是一种“客观性”，即，表达一种状态的稳定（process）。

A，B主谓不一致。
D，E "have effect" is one of the many aspects 语义错误