选项和温度有关即可

定位句The large volume of transactions associated with these activities seems to have necessitated hierarchical management structures 。C选项的largest原文中没提。

大家都别吵了，求助了GMAC官方，官方回复（太长，已省）意思是对于有一些表示“出现、就位、形成”的动词，在不会造成歧义的情况下，可以放在被修饰的名词与定语从句之间，以避免动词在长长的修饰成分之后出现，造成了动词距离主语过远的awkwardness. 因此，这题which并没有真的 指代句子 ，而是仍然指代名词（修饰名词）！至于你们所谓的OG官方解释，OG题的解释工作是外包的！

一定一定还是要注意economic和economical的区别 含以上的

①OG提到是一个hepothetical situation(知道更多），所以要求一个“conditional”或“contrary-to-fact”结构，所以要用would have to know.
②DE去比较的话...还是补全了than now 要更优一些

真的迷惑了，虽然不得不选择D，可是Conestoga wagons had......a floor ......。为什么是 a floor?

besides adv. prep.

一定要用心体会 prevent OR inhibit 这里最好不要用and

the possibility ~ (of sth/doing sth); ~ (that...)
①The possibility of breaking the world record never occurred to him.
②Is there any possibility that we'll see you this weekend?
③What is the possibility of the weather improving?

does tend at times to conflate "women" and "women writers," assuming that women's gender, irrespective of other social differences
这片真的好难，观点隐藏的好深T-T

①more+adj.+noun==>本身就是一个很有歧义的表达 排除DE
②more ... than at any time // or // more ... than at any other time
any里就包括了现在的时间
eg：...offer evidence more dramatic than what has yet been discovered of the close evolutionary.==>EVIDENCE HAS YET BEEN DISCOVERED 包括了句子开头的EVIDENCE ，所以要用最高级比较合适

E可不可以理解为，如果之前比例没超了，则教师人数是饱和的，则现在即使学生增多了，也不需要更多的老师了？

little of 后面加不可数名词，不能加可数名词复数。

influential on不优
E that of his own表示music of his music不合逻辑

social work belong to university 和be offered a courses不是并列的，由于前者导致后者，因此不能选B

一定要去注意economy是有单复数的...

D选项：two big reasons
1) "the economy of Britain, France, and Germany"
--> illogically implies that these three countries share only one economy. (note that the correct answer correctly uses the plural "economies" to refer to the existence of three different economies.)
2) "with the unemployment rate that has remained"
--> implies, without justification, that the dutch economy is the ONLY economy with an unemployment rate that has satisfied this criterion.

一方在UDS销售，另一方不在UDS销售，这样作对比不是更能比对出结论吗？

注意：题目中的some是adj表示大约的意思
some 4000==》其实指代的是4000 drive-ins ，是一个可数名词