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题目：

On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

选项:

A、On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow
B、On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth
C、On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles
D、Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate
E、Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow

答案:

E
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题目：

According to recent studies comparing the nutritional value of meat from wild animals and meat from domesticated animals, wild animals have less total fat than do livestock fed on grain and more of a kind of fat they think is good for cardiac health.

选项:

A、wild animals have less total fat than do livestock fed on grain and more of a kind of fat they think is
B、wild animals have less total fat than livestock fed on grain and more of a kind of fat thought to be
C、wild animals have less total fat than that of livestock fed on grain and have more fat of a kind thought to be
D、total fat of wild animals is less than livestock fed on grain and they have more fat of a kind thought to be
E、total fat is less in wild animals than that of livestock fed on grain and more of their fat is of a kind they think is

答案:

B
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题目：

Starfish, with anywhere from five to eight arms, have a strong regenerative ability, and if one arm is lost it quickly replaces it, sometimes by the animal overcompensating and growing an extra one or two.

选项:

A、one arm is lost it quickly replaces it, sometimes by the animal overcompensating and
B、one arm is lost it is quickly replaced, with the animal sometimes overcompensating and
C、they lose one arm they quickly replace it, sometimes by the animal overcompensating,
D、they lose one arm they are quickly replaced, with the animal sometimes overcompensating,
E、they lose one arm it is quickly replaced, sometimes with the animal overcompensating,

答案:

B
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题目：

Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.

选项:

A、Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.
B、An executive who is heavily committed to a course of action, especially one that worked well in the past, makes missing signs of incipient trouble or misinterpreting ones likely when they do appear.
C、An executive who is heavily committed to a course of action is likely to miss or misinterpret signs of incipient trouble when they do appear, especially if it has worked well in the past.
D、Executives' being heavily committed to a course of action, especially if it has worked well in the past, makes them likely to miss signs of incipient trouble or misinterpreting them when they do appear.
E、Being heavily committed to a course of action, especially one that has worked well in the past, is likely to make an executive miss signs of incipient trouble or misinterpret them when they do appear.

答案:

E
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[Problem Solving]

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题目：

The charge for a single room at Hotel P  is 25 percent less than the charge for a single room at Hotel R  and 10 percent less than the charge for a single room at Hotel G . The charge for a single room at Hotel R  is what percent greater than the charge for a single room at Hotel G  ?

选项:

A、15%
B、20%
C、40%
D、50%
E、150%

答案:

B
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题目：

The remarkable similarity of Thule artifacts throughout a vast region can, in part, be explained as a very rapid movement of people from one end of North America to the other.

选项:

A、The remarkable similarity of Thule artifacts throughout a vast region can, in part, be explained as
B、Thule artifacts being remarkably similar throughout a vast region, one explanation is
C、That Thule artifacts are remarkably similar throughout a vast region is, in part, explainable as
D、One explanation for the remarkable similarity of Thule artifacts throughout a vast region is that there was
E、Throughout a vast region Thule artifacts are remarkably similar, with one explanation for this being

答案:

D
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题目：

A ruined structure found at Aqaba, Jordan, was probably a church, as indicated in its eastward orientation and by its overall plan, as well as artifacts, such as glass oil-lamp fragments, found at the site.

选项:

A、A ruined structure found at Aqaba, Jordan, was probably a church, as indicated in its eastward orientation and by its overall plan, as well as
B、A ruined structure found at Aqaba, Jordan, once probably being a church, was indicated by its eastward orientation, overall plan, and
C、Indicating that a ruined structure found at Aqaba, Jordan, was probably a church were its eastward orientation and overall plan, but also the
D、A ruined structure found at Aqaba, Jordan, was probably a church, as indicates its eastward orientation and overall plan, as well as the
E、That a ruined structure found at Aqaba, Jordan, was probably a church is indicated by its eastward orientation and overall plan, as well as by the

答案:

E
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[Critical Reasoning]

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题目：

In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent.  In contrast, in the year prior to the tax increase, sales had fallen one percent.  The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.
 
The argument above requires which of following assumptions?

选项:

A、During the year following the tax increase, the pretax price of a pack of cigarettes did not increase by as much as it had during the year prior to the tax increase.
B、The one percent fall in cigarette sales in the year prior to tax increase was due to a smaller tax increase.
C、The pretax price of a pack of cigarettes gradually decreased throughout the year before and the year after the tax increase.
D、For the year following the tax increase, the pretax price of a pack of cigarettes was not eight or more cents lower than it had been the previous year.
E、As the after-tax price of a pack of cigarettes rises, the pretax price also rises.

答案:

D
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题目：

For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle.

选项:

A、each a roof of poles and arrowweed
B、each a roof of poles and arrowweed that are being
C、with each being a roof of poles and arrowweed
D、with roofs of poles and arrowweed to be
E、with roofs of poles and arrowweed that are

答案:

A
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题目：

Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over North America, they are named for the New Mexico site where they were first discovered in 1932.

选项:

A、Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over North America, they are named for the New Mexico site where they were first discovered in 1932.
B、Although named for the New Mexico site where first discovered in 1932, Clovis points are spear points of longitudinal grooves chipped onto their faces and have been found all over North America.
C、Named for the New Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over North America.
D、Spear points with longitudinal grooves that are chipped onto the faces, Clovis points, even though named for the New Mexico site where first discovered in 1932, but were found all over North America.
E、While Clovis points are spear points whose faces have longitudinal grooves chipped into them, they have been found all over North America, and named for the New Mexico site where they have been first discovered in 1932.

答案:

A
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[Undefined]

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Unlike many United States cities, where a river is no longer the focal point of urban life, the river in San Antonio winds through the middle of the business district, and the River Walk, or Paseo del Rio, is the city's most popular attraction.
金老师好，想问DE怎么比较呢？以及B里面的两个the river我理解可以指代不同的河流，他们限定词（in many cities in San Antonio)不同。希望老师解答一下，谢谢！
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20562浏览

[GWD]

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The passage suggests that evidence for price promotions' "effect on the bottom line" (in the highlighted text) is provided by
郭老师好，这个题的evidence for price promotions 的定位感觉比较难。我觉得while之后其实都在说这个strategy的好的部分，然后往前找答案。the bigger the loss感觉和答案有关。但是没理解the frequency和答案怎么联系的呢？
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777浏览

[Official Advanced]

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Which of the following words, if substituted for “brilliant” in line 26, would LEAST change the meaning of the sentence?
请问Tina老师这种比较复杂要体会作者背后意思的题目以后要怎么做呢？我对这篇文章的理解是作者介绍了编辑在处理书评时考虑的问题，做完题目后仔细看了一遍才体会到作者在隐晦地批判这种行为，但是临场做题状况下根本读不到这层意思。特别是这题我做的时候不知道这是什么题，只能当细节题做了。问题是，当我看答案之后就知道了为什么选E，但是做题的时候就体会不到为什么是absurd，觉得是brilliant应该是褒义的，第一时间就排除了absurd，勉强选了一个literate，果然错了。而且觉得也无法跳读，第一遍跳读反而漏掉了很多细节，做题的时候只能返工又读了一次，很影响做题的情绪，觉得自己没做好。实战的时候也有这种问题，主旨题当细节题做，想知道怎么做这种难题！谢谢老师
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5194浏览

[OG19]

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Over the past ten years cultivated sunflowers have become a major commercial crop, second only to soybeans as a source of vegetable oil.
only second to 和 second only to怎么区分，这题选的E
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[Undefined]

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The human nervous system and a telephone system superficially resemble each other, not only because the former carries information in the form of electrical impulses and because all of its neural pathways converge in the brain and spinal cord, which together form a kind of central exchange.
金老师好，这个题的B和C我觉得都对。C里面的both because and because 更平行，但B里面because and because好像没有问题。想知道这个题目怎么考虑？
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6316浏览

[Undefined]

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The Chicago and Calumet Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing canals so that the water now empties into the Mississippi by way of the Illinois River.
想知道为什么E的"the construction of..." 比 A的by constructing更好？老师可以讲一下动名词和名词的区别吗。RON说because we are talking about the process from a detached standpoint (i.e. there's no mention of a a subject who is directly involved )vs. the army engineering corps redirected the rivers by constructing canals.我没理解。Verbal nouns (like "the exposure") are impersonal: they don't convey the idea that the subject is directly involved.Gerund generally do convey the idea that the subject is directly involved in the process。RON的意思是动名词出现的时候必须有一个主语做动词原形的主语吗？谢谢老师
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7297浏览

[GWD]

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At an orientation meeting, the travelers were told that a visa, a landing card, and evidence of inoculation against typhoid fever would be needed by each of them.
我认为D选项each是同位语，那么谓语动词要依据they，所以用need不用needs。但是，既然是复数，为何不像E选项一样，用visas，cards。所以我认为A选项虽然用被动，但是语法也没有问题，和D选项相比，A更好一点。
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[Undefined]

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The author implies which of the following about the ability of the researchers mentioned in line 18 to predict earthquakes?

老师这道题我的混淆选项是A。关于C选项，文中哪里可以看出无法大致预估地震的发生时间呢？然后刚好A选项的无法预估大小和文中的“magnitude”那句话很符合，所以我做题的时候排除了C而选了A。
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[Undefined]

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The sum of the first k positive integers is equal to $$frac{k(k+1)}{2}$$. What is the sum of the integers from n to m, inclusive, where $$0<{n}<{m}$$?
老师好，借题问一下鸡精 K≠3，K 的 units digit？ 条件 1：(2k)^n 的 units digit=6 条件 2：(3k)^n 的 units digit=1 请问怎么做呢？ 还有一个类似的 一个工厂生产地毯，以下是已知的条件： 1）一个月有 30 天，月初第一天末的库存有 280 件； 2）之后 11 天每天库存多 x 件，剩余天数每天减少 y 件。 问：以下条件能否判断 x 和 y 是多少？ 条件 1：月末库存有 320 件； 条件 2：其中 x-y=10。 解析： 条件 1： 可以列出方程：280+11x-18y=320 ➔ 11x-18y=40。 因为 x 和 y 都是整数，所以唯一满足方程的解是 x=20，y=10。充分。这种怎么估算的呢？而且怎么确定唯一解的呢？ 老师两道题都是想问一下，猜数怎么猜 谢谢老师
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[Official Advanced]

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The cathedrals of the Middle Ages were community centers just as much as they were purely religious edifices; and they were structures that represented a city’s commitment to a public realm, the opposite of being a private one.
老师可以讲讲DE之间的区别吗，我想知道两者中的structure分别是什么结构？D中的structures是做同位语吗？是的话，是谁的同位语？E中的structures representing..结构我也觉得没有错，E中的they were冗杂，但并不是绝对错误，是错在opposite of 吗，那么【, as opposed to a private one】和【, opposite of a private one】这两个结构又有什么区别呢？谢谢老师
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