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。"

"主语是each，动词用单数，排除ABC
DE
THE DEGREE TO WHICH表示到什么程度。
OF THE EXTENT 什么的程度"

【转载】 宾语从句强调整体, 谓语+宾语结构只强调宾语
(A) of there being代替that同位语从句表达复杂,笨拙并且不符合习惯.
(B) 错误同A选项
(C) 错误同A选项
(D) 正确, 用that同位语从句清楚地解释了generalization的内容 这里的little是名词，第二个that引导定语从句
(E) In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.
eg. There was very little food left over at the end of the party.
There were very few crab cakes left over at the end of the party.——即little of + 不可数名词，few +可数

through后面的improve为什么不用ing形式而是用ed形式呢

独立主格表伴随

在require, demand 等表“建议,命令”意义的词（无论动词还是名词）之后的that 从句,要求用虚拟语气动词,即动词原形,不加should
用逗号将连词隔开,使得逗号前后两个句子变成独立的句子

A convince of sth doing 错误，这里convince的社会工作教育属于大学这件事，而不是convince 社会工作教育
B should 错误 GMAT中should表示道德上的义务，用在这里不合理。另外属于大学和提供课程给学生不应该是并列关系
C convince about搭配错误
E 平行错误 前面是convince of 后面是convince that 而且 being in也不对

belong in 应归于...（地方、范畴）
belong to 属于...财产/一部分/成员

自然数里，三个数内肯定能有一个数能被三整除~N不能被3整除，那N-1或者N+1肯定可以被三整除；同理，自然数的两个数内有一个数能被2整除，如果N又不能被2整除，那N-1和N+1肯定都能被2整除。如果N-1能被2整除，那N+1肯定可以被4整除（因为里面又多了一个2了），因此，(N-1)(N+1)肯定可以被2*3*4整除

ACE不是完整句子
B选项 borrowing images和前面的 thought and figures不平行 同时B选项把主语和谓语动词用逗号分开了，错误

"句子结构: Records from… indicate that… and that..

""base是动词，based on是伴随状语，跟随主主语，wrong：Based on ancient records, women…… 排除AB
错选C C里面according to是正确的
a new woolen robe that they used to dress a statue of the goddess Athena，robe做定语从句的宾语，they used robe to dress...... 这里是ok的
and that this robe depicted scenes of a battle......这是个完整句子，所以需要并列一个that引导的完整句子，很明显句中没有，所以错
D正确
E indicate需要加that，因为后面有that"

"错选B
either or 平行排除ACE
that代指是animals，只有animals才能exhibit preference，而不是list，排除B"

错选B
BC中in less than 和since都是时间状语，不能有两个时间状语修饰
B since加ING的逻辑主语是后代，不合理
C中since后面是过去完成时，主句也是过去完成时，不合理
D it无指代
E 语意错误。原句有先后顺序，E搞成了并列

没注意两句话区别：by subscribers

a选项，问的是玻璃和铝重量之间的下降，但是文章提到的下降是重量下降的百分比，所以a选项不对。

D的选项没看懂： The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.

第一句是支持结论，第二句是结论。没有转折！