GWD语法题里一个句子
Engines burns less fuel than gasoline engine of comparable size, as well as emitting less gas or far less of other gasses that have been implicated in global warming. 看过语法书里说动名词短语是没有逻辑主语的，所以 as well as后面为什么可以直接加emitting 不用加 it 这样的逻辑主语吗？
prep2012 语法题里的一个选项
The golden crab of the Gulf of Mexico has not been fished commercially in great number, primarily because of living at great depths. 看答案解释说这个选项缺少逻辑主语 it ，正确选项是because it lives at great depths, 需要加 it 这样的逻辑主语?

and做连词不应该也可以表示因果关系吗，还是and作为表因果关系的联系太弱了一般不考虑啊？

就选E，其他都太ugly了不想说

E选项里的while放在这里是不是不对？while是不是连词应该连接两个句子？

注意结论主语是any species of monkey，所以是枚举推理，C指出文中提到的样本rhesus monkeys与其他猴子的区别。

"but" is a coordinating conjunction. it's in the same category as "and" and "yet".
"even though" MUST be followed by a clause.
"although", however, can be followed by an adjective or adjective phrase: james, although bigger than many of the other players, is one of the fastest men on the team.
although从句省略主谓，只能省略be一类的词；have been sighted这类词不能被省略
E中which跳跃修饰dark spots；没有转折词，完全改变原句意思

although后不是必须要接clause，比如Although feeling damn hungry, I had to stay to listen to the boss’s sermon.
但是，当although出现在主句之后时，不能省略主谓语。（When ‘although’ is found after the main clause, then it can only be a conjunction and should necessarily start subordinate clauses. It cannot be a modifier. ）
比如 I had to stay to listen to the boss’s sermon, although I was feeling damn hungry. 正确
I had to stay to listen to the boss’s sermon, although feeling damn hungry.不正确

用现在完成has taken 85 percent of the age of the universe to reach us，是说light 还在到来的路上吗？

注意问法，双重否定against...false所以是要加强oceangraphers的观点

C改变句意

过去的时点就没必要用former了。。。

老师，b里的borrowing为什么不能理解成是修饰图片的形容词呢

"通常后置定语描述的是名词的暂时属性，前置定语描述的是名词的永久属性或固有属性。” MARK.

"with which", 介词＋which
e.g. 'Here are the cities to which I've already travelled.'

还需留意未划线的。。。

二刷又错。。。Inverted construction!!!
“which"指代the aramaic script, 那么需要有一样东西derive from the aramaic script.
since that something doesn't precede the verb 'derive', it must follow the verb 'derive'.

Instead we have found that the rotational velocity in spiral galaxies either remains constant with increasing distance from the center or increases slightly. This unexpected result indicates that the falloff in luminous mass with distance from the center is balanced by an increase in nonluminous mass.

Instead we have found that the rotational velocity in spiral galaxies either remains constant with increasing distance from the center or increases slightly. This unexpected result indicates that the falloff in luminous mass with distance from the center is balanced by an increase in nonluminous mass.

还是没能理解选项里and more of a kind of fat里面的“and”指的是什么意思？看不出是和哪里并列的关系...

It can be calculated that the critical density of matter needed to brake the expansion and "close" the universe is equivalent to three hydrogen atoms per cubic meter.