rob the oysters there of their flavor和make them smaller ...的不是increasing demands，而是盐度变化，应该用独立主格来表示这种影响。

A which用法错误
B it指代作物
C rob的主语是increasing demands，错误
E and making them decrease in size前面不要逗号

in spite of/despite表示转折，whereas表示对比，应该要用whereas， 排除AB

A in despite of错误，要用in spite of / despite
B previously的位置错误，that从句的时态错误，要用过去完成时
时态错误，排除CD，而且CD没有跟前面形成对比，应该是1940s, popular magazines ...., whereas previously these publications ....

主语是increases，复数，A的谓语动词用的单数，排除。
DE，缺乏谓语，排除，剩下BC
B在分号后面的部分不是一个完整的句子，排除

including后面要用and表示列举，排除AB
C里边要用such as，不能用as
E是from ... to...

digging in sediments的是scientists，排除AB
evidence是一个具体的“事件”，而不是某一个名词。
C suggesting的是一个具体的“事件“（that...）
D和E suggest的都只是“emergence”

这题排除法可做出来

E. In the sentence in which Pierre is mentioned, the author of the passage does not endorse criticism suggesting that Melville's works are romances rather than novels.

A. 32‾√=18‾‾‾√32=18

B. 23‾√=12‾‾‾√23=12, which is less than A.

C. 43‾√5=0.83‾√435=0.83, which is less than B.

D. 52‾√4=1.252‾√524=1.252, which is less than A.

E. 73‾√=493‾‾‾√≈16.33‾‾‾‾‾√73=493≈16.33, which is less than A.

等差数列求项数

N=0.5X, W=0.48X, N/W =1.04

三月0.94，五月1.0098

Since A, B and C are squares with area as 144, 81 and 225, the side in each case is 12, 9 and 15. Note that the sides are in the ratio 3:4:5.
So X must be a right triangle.
Area X = (1/2)*12*9 = 54

substitute k and x out.

K=5T
X=5-T

记得以前OG上也做到一道关于plan成功预测的。选项同样也是预测会…… VS 另外一个城市采用同样的方案成功了。选了后者。前者错在重复前提，预测会发生的事情毕竟没有已发生的事实来得有说服力。

as many（much） as 不能连用数值类名词：population、pay、amount、size、number、increase、drop等

A(3_3)=6 , there are 6 ways to choose the bike in total.
the probability of each bike be chosen is 1/3

1/3*1/3*1/3*6=2/9

this formula means: there are 6 ways that each bike will be chosen.(ABC ACB BAC BCA CAB CBA), and each time the probability of the group is 1/3*1/3*1/3.
so, the totally probablity is 6 times 1/27, which is 2/9

BDE中，which和although都要引导一个句子，但是后面的restricted their gains是做limiting their investments to the U.S. stock market的谓语，所以which和although都是多余的。
C despite后面不能直接跟that从句，要用despite the fact that ...

A which brightened ... and also knocking ...， brightened和knocking不能并列
E brightening ... and it knocked不能并列
D it多余

BC语法上都对，但是B说的是”an expanding cloud导致了a large storm，这个cloud还brightened ... 和knocked out...“，C的意思是”cloud产生storm，同时还brightened ...和knocked out ...“，因为是伴随状语修饰主句，brighten和knocked out是跟着storm的形成同时出现的，不是一前一后，C的意思更准确。

主语是knowledge，谓语用单数，排除AE
B中不需要that of。
C和D，不管是独立主格结构informing ...和as从句，都是表示的原因，但是这两个表示的原因不一样。informing both ... and ...，只是说因为对literary style 和content都有影响，所以说knowledge对他成为作家有帮助；as it informed ... as much as...，是说因为对这两个方面的影响一样，所以才说knowledge对他成为作家有帮助，这种说法就不合理了，难道对这两方面的影响不是一样，就不能说knowledge有用了吗？语义上讲不通，不能选D。

B there is general market inactivity和it has provide ...是两个句子，没有连词，不对，排除。
E that引导的表语从句总没有谓语，排除。
C Making things even more difficult general market inactivity, if not paralysis, has lately provided ....，前面的making things even more difficult和主语general market inactivity之间最好有逗号(?)，还有lately的位置错误，应该和even more difficult放一起，表示”最近更难的是..."。
剩下AD。

A如果还原成正常语序：general market inactivity has been making things even more difficult lately, ....，完成进行时表示的是从过去某个时刻开始一直持续到现在的状态，那就是making things even more difficult这个动作已经发生有一段时间了，和题目要表达的最近才让发生的意思不一样。题目的意思应该是”虽然还不能说市场已经瘫痪，但市场的不活跃，最近让事情变得更难了，它对定价没什么帮助“。