Shungite---irrelevant

has proved inadequate.......不是dose not support.....！

补充：D 中有Many，说明这些多花钱不在乎堵车的人只是一部分，并不是全部，样本不全面。

关于杂志订阅者的调查：在所有针对广告而下的订单中，30%都是35以下的订阅者下的。
关于登广告的人的调查：针对广告而下的大部分商品订单是由三十五岁以下的人下的。
订单大部分是35岁以下人下的，这其中却只有30%是订阅者，说明另外下订单的70%的人不是订阅者。

gear phrase.  使为…而准备；使为了达到…而作好准备 做好准备 并不会导致状态的改变

D: “20 percent of the world's fresh water, which is more than all the North American Great Lakes combined.”
(amount of water) IS MORE THAN (specific lakes)
that's an illogical comparison; you can't compare a numerical amount of water (a numerical quantity) to a lake (a physical object).

他们不会有，或可能不会有，要用nor，用or的话语义不对

这题太直白了，没敢选B，原因：ever before的意思应该是“以往任何时候”啊。联想到例句：I am taller now than before. 实际上完整的句子应该是I am taller than I was before.所以最后选了C，还请老师看看哪个地方错了？

关键词：without challenge/without struggle

1.B 科学家等机器的时间减少了，换言之 机器流通性增加了。 但是机器的流通性的增加和文章数量的减少没有关系， 也有可能有的科学家拿着机器只研究不写论文。
2. "fewer articles..." is a fact. B无论如何不能削弱已知的 fact.

每种型号的边际利润没变，卖的电脑数量没变，但是总利润上升.说明利润大的电脑型号卖的多，利润小的电脑型号卖的少（也就是第一次买电脑的人少了）

P（白球∪偶数）= P（白球）+ P（偶数）- P（偶数白球）
条件一：P（偶数白球）= 0，不充分，白球都不是偶数不代表偶数都不是白球；
条件二：P（白球）- P（偶数）= 0.2，不充分
结合还是无法求得

C: Laos with population of only 4 million people
Here, the with-modifier in red implies that there is MORE THAN ONE Laos -- Laos with a population of only 1 million people, Laos with a population of only 2 million people, Laos with a population of only 3 million people -- and that the sentence is referring to ONE SPECIFIC Laos:
Laos WITH A POPULATION OF ONLY 4 MILLION PEOPLE.
This meaning is nonsensical.
There is not more than Laos.
Eliminate C.

five different integers

①r= 18；m= 6
②r= 36；m= -12

a其实挺难排除的。是否可以依据图形背景的原则，不活跃的市场让事情变的更困难和不活跃的市场provide ＊＊相比，前面应该是背景？

if you say "subject + clause + IN VERBing", then subject + clause must be an ACTUAL PART of the action of VERBing.
e.g.
i solved all the problems in OG12 in preparing for the GMAT.
--> notice that solving the problems IS ACTUALLY PART OF preparing for the test.

choice (c) fails here, too, since organizing the campaign (the main clause) is not ACTUALLY PART OF convincing the government.

be forbbiden to do something

them有没有可能指代orders呢？

和楼上同疑惑，除非grow做系动词用。