A，我在想也可以用局部VS整体来去解释。highly-competitive是局部，而结论是强调overall market，因此不能用局部的price increase来推出整体。

这是三个事务前后引起与被引起关系。

A里，which不能指代句子，算作没有先行词；B，同位语，但是也没有先行词，动词时态不对；C也无先行词，动词时态也不对；D，wordy，表示become the largest manufacture 是这个deal的一部分，而不是这个deal的outcome，显然表示outcome会更好；E，表示Outcome, 动词时态是将来时，correct.

OG2017官方解释


Diction; Verb form
The point of this sentence is to explain how overfishing and interference with shad
spawning streams affected the size of shad landings. The sentence makes this point by
comparing the sizes of annual landings before and after 1920. The sentence most
efficiently compares the poundage of pre- and post-1920 landings with the comparative
form [from] more than . . . to less than. . . .

官方解释
续

A. The present-perfect tense of have blocked inappropriately describes an event that
caused something to happen before 1920. In addition, migrations up their
spawning streams is incorrect.

续

B. Correct. The comparison of poundage is efficiently explained, and the sequence of
tenses makes sense. Despite a possible superficial appearance of a comparison
between countable things (pounds), less is more appropriate than fewer for the
comparison. The fishermen landed different amounts of fish; they did not land the
numbers of pounds in terms of which those amounts are measured.

续：


E. The present-perfect participial phrase must be set off with commas; the pronoun
their, which is also in (A), nonsensically refers to migrations, and the comparative
expression to an amount lower is unnecessarily wordy

设machine x和y的生产速度分别为x、y个widget/day,
根据题干有
w/x-w/y=2
3x+3y=5/4w
求2w/x
令m=w/x,n=w/y
转化为
m-n=2
3/m+3/n=5/4

这题选了D，倒装就看不准主语是谁...
以及虽然it看起来是指代empire,可这个指代真是谜一样令人费解。

？

嗯 比较是一种特殊的 平行 语义和结构都应该平行

把A翻译出来看，让事情更困难是整个市场最近不活跃

请问老师with结构如何解释进行排除呢？

老师C，E的paths有问题吗？前面是their 为什么要用单数呢？

without + nor也不是习惯表达

最后一句不就是结论吗？收成好——价格下降，但这是however型，出现了价格上升的情况，找可以解释这个矛盾的选项。

想请问一下 compliance怎么发出protect这个动作? 因为不理解这个点 把B排除了

a难道不是主谓一致的错误，waters谓语动词不应该是单数啊。

立方体啊

看清题目！是题干支持选项（演绎推理），不是选项支持题干（strength题）！