用了额外训练的人不一定会更有经验

AB选项：比较级＋than，排除A
C选项：which定语从句貌似在修饰前面的20年前；
D选项：fewer than固定搭配，没有fewer...compared to这样的搭配
E选项：比较对象变了：US used...water 与the period of ...

ABD选项代词their ,them指代模糊；E选项respond应与identify平行

like 不能接句子 such as to 没这种用法

； 前后 完整句子

having 感觉和前面指代 不明吧

错选D 以为是员工 高兴 应该是 老板高兴 所以才给员工涨工资

平行 和 措词

考查比较，由like引出，AB选项比较，A主语（比较的对象）与like后面比较的对象属于同类可比事物；B将人和Tolstoi's rebellion比较，
CD选项：都是as引导，但是as只能引导句子表比较，不能引导名词或名次短语，所以C选项错误；D选项比较对象有问题：人和Tolstoi's rebellion,❌
E选项：Tolstoi's rebellion was against...冗余，换成Tolstoi rebel against...更直接

AB考查concern的同位语从句，as...as +N; Adj enough to do;
CDE中concern with是错误搭配；so fast as to，fast enough so as, possibly 和possibility都是造成句子冗余

A选项：现在分词giving...修饰前面命名的这件事，不合理；
B选项：that 前面是一个完整的句子，that 后面是一个句子的系表结构，也不是从句，所以B选项语法上有问题；
C选项：最后called Polar画蛇添足，多余；
E选项：句首的现在分词sweeping做状语修饰主句的主语scientist' best look,有问题,应该修饰satellite

We don't need a “those” here. 'when the use of ddt was...' is, or at least can be interpreted as, an adverb phrase (not an adjective phrase).
if the descriptive phrase placed there were an adjective phrase (or were being interpreted as one, at least), you'd want 'those' to assure a parallel construction.

DE therefore, so多余

按照GMAT以前的题目，At first,X begins这种多余的表达均为awkward。with the goal to不如直接用to 应该是其真正考点。

b then it implies that (1) sometimes the vantage point was combined with the writing and sometimes it wasn't, and (2) it only made her valuable when it was combined with the writing talent. that doesn't make sense.事实上没有一种情况是这个vantage point 是不在这个时间的，所以说用when 去形容，之所以是vantage point 就是以你为这几个因素的结合。而不是说本来就有一个vantage point只有在这个时期有了talents 才能让她有价值。

whether 有不论不管的意思。一直以为是表示是否，所以没看懂后面的句意了。

C选项不定式作目的状语，平行结构

笔记：主要纠结于从句时态：
1.如果用一般过去时were也不如一般现在时are好，因为句意是持续的现在还在发生的
2.来自曼哈顿论坛的助教回答：
That said, there's a difference in meaning. Consider the following (correct) sentences:
When I was 10, my parents changed the time I go to bed.
When I was 10, my parents changed the time I went to bed.

A选项：number要用greater,而不是more than来形容；
C选项：their主语是单数，❌
DE选项：冗杂

我以为“is lined……”的主语是weight