Taiwan？？？

感觉这种题目只能跳过，但想要跳过的时候已经迟了

主语是谁？？考虑清楚！

主语fossils和谓语动词made之间不应添加逗号，例如：
(1) I play cards.
(2)** I, play cards.
句(2)是错误的，不能用逗号隔开主语和谓语动词。（有时因有插入语导致谓语动词身前有逗号，这不矛盾。因为那个逗号是用来隔开插入语和主句的，不是用来隔开主语和谓语动词的。语法上不允许有目的是为了隔开主语和谓语动词的逗号）

his own=his music

首先，由于本选项的dated是过去分词（不可能是过去时，因为date理应是被动语态，若是谓语动词的过去时应该用were dated），所以其引导的部分应该同found in Puerto Rico in 1991平行。鉴于此，and dated at 34 million years old身前和身后的逗号是不应该加的（只有三者平行或者两个完整的句子间的and前才应该加逗号）。

aving done 结构肯定是做状语的修饰主句的动作的，不是定语来修饰名词的。如果你having done结构只是来修饰一个名词的，那何谈和名词的先后顺序的？ 那什么时候 现在分词doing 做定语呢？在GMAT中 如果 doing结构不加逗号直接放在名词后面，往往都是做定语的，所以我们可以推断出: having done 是永远不会做定语的。具体来说 也就是永远不会没有逗号而存在。
1. men and women，所以要用themselves，排除CE
2. D选项还原 it had previously been considered of men and women they were incapable of discerning truth for themselves ，首先引导从句省略了that，其次句意完全读不通，所以排除
3. having been done只能做状语

B. 主语是their descendants，变成了descendants released the honeybees，错误
C. 两个过去完成时，错误

1) date….to 可追溯sth到...几年，强调发生的时间点，后面是ago

2) date….at 年代判定、鉴别/年份有….年之久，强调发生到现在经过的时间有多长，后面是old

date back: have its origin ——eg. burial sites dating back 5000 years

date from: to reckon from some point in time——eg.images date from the time of the Kushan empire

D there was less than one percent of homes that had electricity，主谓不一致，there were less than one percent of homes
另外重心变成了there was homes

分词短语providing entertainment是represent的伴随状语，其需改为和represent的并列句。这是因为，“代表首长”和“提供娱乐”是两个方面的事情，之间没有因果关系。

"evidence to suggest" and "evidence that suggests" are both acceptable in this sort of context. neither is a basis for elimination. normally you would see "evidence that suggests..." however, they've used "evidence to suggest..." here, in order to avoid writing evidence THAT suggests THAT xxxxx. not because it's wrong -- just because it's ugly.

B：descend from意思是下降；be descended from才是“...是...的祖先”

not only is Jupiter three times as massive as Saturn, the next largest
选项还原成为正常语序：Jupiter is not only three times as massive as .. 和 but also 后面的 possesses four of the largest satellites, or moons, in our solar system.不平行
Singing a tuneless song, there comes Matt. 这样倒装不对

the raising of rates 很wordy

A makes it likely to miss... this doesn't work. technically, this would mean that "it" - an unspecified entity - is likely to miss the signs. if you use the "it is ADJ..." construction, and the verb has a specific subject, you MUST include that subject in the construction. it is likely that the executive will miss...
The following sentence is awkward, but grammatically defensible: Commitment makes it likely for an executive to miss signs of trouble.

if "being" expresses IDENTITY or CHARACTERISTICS, then kill it. otherwise, evaluate it on the same merits as you would any other verb., 2，in this case, "being" isn't a modifier; it's a gerund (= NOUN type -ing form). in fact, "being committed" is the subject of this sentence!

More/Less … than …
As … as …
Compared to/with的正确用法：
Now 40 percent of the college students live off campus, compared to 10 percent, the ratio in 1990.

不能混用，如
More … as ×
As … than ×
More/less compared to

E per capita和 per person重复了
a drop是个同谓语
SVO，noun 可能情况有两种：
1、Noun修饰 O
2、Noun修饰SVO

mark

methods reduced time [needed by workers] so that 连词因此 they could produce more. 过去分词作简化的限定性定语从句，与 time that workers needed 本身含义一致。 so that 作结果从句 前后因果成立，方法降低时间，因此提高了生产力。语法句意都没有问题。强调的是方法的价值。 workers needed to produce 是限定时间。表示方法降低了干什么的时间。强调的是降低了什么时间。原句强调减少时间的结果，正确选项强调减少的什么时间。

A is to B what C is to D.