like不可以用来举例 排除BE
D 错误 if省略了主语，逻辑主语应该是this substitution 不合理
C 错误 化肥本身不会导致环境问题，只有化肥使用量增加才会

more than 或者as as 排除BDE
根据语意，show的应该是一件事情而不是动物，选择A
当时没选是因为includes不对 that指代是group

这道题好迷。。题干非得说 ‘most’ bourgeois，自然而然让人定位到最后一句去了。。我甚至怀疑了concur到底是不是一致的意思。。。

延迟满足、先劳动后享受的感觉，塑造了社会的经济活动。
结论：然而，当今社会已经不再像以前一样在我们的孩子身上培养这种延迟满足感了。
依据：以前买一盒麦片，需要先花点耐心把里面送的玩具碎片拼成一个完整的玩具，才能玩（先劳动后享乐）；现在买一盒麦片，里面的玩具直接就是拼好的，可以直接玩（没有劳动了，可以直接享乐）

C选项：以前，拼玩具的孩子和玩玩具的孩子是同一个人。正确。因为只有让同一个孩子拼和玩，才符合先劳动后享乐。如果拼的人和玩的人不是同一个人，那拼的那个人只有劳动，玩的那个人只有享乐，就不符合文章的意思了。（另外，你只让一个孩子拼，然后把他拼好的给别人玩，这是人干的事儿么哈哈哈哈）

【转载】RON： if "with ____" is modifying xxxxx, then it should be describing some aspect, or sub-component, of xxxxx.【with表示某物的一部分】 here, "each" = each style of cooking. we can't use "with each style of cooking..." to describe "styles of cooking".【此处不能说styles的一部分，所以不能用with】。

"each用单数，排除ACE

each a product是独立主格结构，中间拿掉了is
没有each as a product的说法"

https://www.manhattanprep.com/gmat/forums/stock-levels-for-domestic-crude-oil-are-far-lower-t2141.html

看了半天 RON 的解释，要注意几点：
1）possibly 跟 might 没区别，两个在一起才缀余了。
2）价格易受中东石油供应中断的影响，重点是中断，不是石油供应；我告诉自己 不去管什么 being 对不对，她是修饰”石油供应“，重点是一带 being ，表达意义就不一样了。
3）as的问题，RON 说没错，”in that part of choice C, the main problem is the use of a past-tense verb ('was') to describe something that might hypothetically happen in the future!“
4）leaving 的表达已经很直接了，resulting a fact...这么表达不好。

D unlike比较对象不对等
A remained时态不正确 which指代有问题
B 一看就是错的 which后面没有跟句子
C所有格不可以有代词指代 Even as即at the same time，没有转折的意思。

"这里的by是表示engage的方式
fail to do
promise to sb to do承诺某人做某事
"

"result from不可以做伴随状语，排除AD
which不可以指代句子，排除E
原因是温度的增加，重点是增加，而不是增加的温度。排除C"

"C which跳跃修饰，错误
AE having gone做伴随错误 逻辑主语变成了methods
D that跳跃修饰错误

but是并列连词，前后必须平行，后面没有谓语错
""while"" is a subordinating construction, not a coordinating one, so it doesn't have the same strict parallelism requirements as does ""but""."

从属连词可以引导完整的句子作状语从句，也可以引导现在/过去分词，作状语从句
并列连词连接两个独立的句子，如果有省略，要求可以按照前个句子的结构补足被省略句子的结构，D/E and introducing没法补足，结构错误

"the number的谓语是单数，排除AC
B which指代错误
E in fact possibly 矛盾"

"从句说它们(vacuum-tube-driven amplifiers)怎么怎么样，那主句的主语就应该是他们，排除ABC
D by the位置不对，有歧义。"

未划线部分是planet，所以前面一定是Jupiter，排除BE
D and前面不是完整句子
C having detected 错误 work at telescopes和detect之间没有因果关系，同时Comma + ING的形式需要前后动作在同一个timeframe，前面是现在进行时，后面是现在完成时，不正确。

"either or不平行 排除E
A ever had been 错误 前面并没有系动词 不平行 排除
未划线部分说as First Lady怎么怎么样，后面主句应该以这个人为主语，排除BC"

B选项：压力算是导致失业的一个直接原因，只不过不是主要原因

B. Increasing government funding for research into new ways to improve the yields per acre of rice, wheat, and corn crops would help to increase total worldwide annual production of food from these crops. - Correct. Negate and the conclusion also gets negated.

D. Current levels of funding for research into ways of improving grain crop yields per acre have enabled grain crop yields per acre to increase by more than 1.5 percent per year worldwide. - If anything, this option opposes the conclusion. Since there is already an increase by more than 1.5%, should the government provide the funding?

https://gmatclub.com/forum/farmer-worldwide-just-three-grain-crops-rice-wheat-and-corn-accoun-268511.html

Option B- is close but it is not addressing the issue. We need to address how this bid will generate profits. Here it talks about the other products etc.

D：This choice implies that in addition to providing tires to Maxilux at the price in their bid, Rubco can expect to sell replacement tires to people who purchase the Max 100. These replacement tires are not part of the bid, so they can be sold at a different price. That's why Rubco could make a profit by winning the bid, even if analysts are correct that the company will only just cover their costs in supplying the tires to Maxilux. (D) is correct.

https://gmatclub.com/forum/the-maxilux-car-company-s-design-for-its-new-luxury-model-the-max-136971-20.html

'to rate' would be more appropriate for an action that helps the astronomers toward their goal (e.g., To rate the likelihood that asteroids will xxxxxx, astronomers are measuring their current trajectories with exquisite precision.)

in any case, that's not the major problem with choice C. the major problem with choice C is that likelihood is a PRESENT thing, so 'will be' is inapposite.
i.e., the question the astronomers are trying to answer is "How likely is this asteroid to eventually strike Earth?" that's the probability at present.

due to只能修饰名词，排除AB
because of doing 错误 排除E
错选C C没有are的话可能有两者理解
一种是后面的but和前面not the products of natural selection平行，另一种是后面的but直接接在because后面

"GMAT中if不可以表示是否的含义，排除AB
in depth是固定搭配，排除D
C 结构错误 if引导的虚拟语气中只有if从句可以省略倒装，主句不可以。"