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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：

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
18答疑

[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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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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[Undefined]

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Many teenagers undergo stress, but results of a recent study indicate that the patterns of stress that girls experience are more likely to result in depression than are those that boys experience.
A选项中的are为什么会放在those that boys experience前面，不是应该在后面吗？
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[GWD]

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Under high pressure and intense heat, graphite, the most stable form of pure carbon, changes into the substance commonly referred to as diamond and remaining this way whether or not the heat and pressure are removed.
请王文静老师回答一下这个问题，谢谢！请问老师D选项是错在in this way还是although了？如果是错在in this way了，那么E选项的thus为什么比in this way好？从词汇的角度看，Oxford Advanced Learner's English-Chinese Dictionary里thus的解释就是“in this way”，为啥在这句话里thus更合适哩如果是错在although, 也请老师讲讲although提现的逻辑有啥问题。谢谢！
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To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
请问Tina老师，这里可以理解为比较的是动词know吗？如果是know more in the future than in the past ，比较介宾短语，是对的吗？谢谢老师
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[OG]

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Written early in the French Revolution, Mary Wollstonecraft’s A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792) attributed Europe’s social and political ills to be the result of the dominance of aristocratic values and patriarchal hereditary privilege.
错选了E. 首先读原句感觉没什么大问题就是后面那个ills to be the result of xxx感觉有点奇怪 后来通过对比选项发现根据主语的不同（人/作品）分成了两类, 感觉E选项“MW,（在作品xxx中）,attribute sth to sth” 人把social and political ills归因于the dominance of xxx，也讲的过去. CE只是主语不同 所以不知道E哪里错 多谢老师
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[OG]

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In no other historical sighting did Halley’s Comet cause such a worldwide sensation as did its return in 1910–1911.
C和E错选了E 已经看出主谓宾都全，比较的状语；如何判断in 的位置 请老师讲解 谢谢
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[Undefined]

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Last week local shrimpers held a news conference to take some credit for the resurgence of the rare Kemp's ridley turtle, saying that their compliance with laws requiring that turtle-excluder devices be on shrimp nets protect adult sea turtles.
A和B错选A 被require需要虚拟语气这个点绕了进去.... 请老师讲解一下这个点吧 谢谢
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[GWD]

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After several years of rapid growth, the healthy care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its payment to doctors and hospitals.
请王文静老师回答一下这个问题，谢谢！ 老师，我针对A选项有以下几个问题： 1）while的用法是否有误 2）while是否和but一样可以引导并列复合句，并且表转折 3）while it...——这个it是否多余 4）falling behind in its payment to sb这个用法有何不妥 针对E选项： 1)E选项中的falling months...是否是前句的附属修饰成分 2) E选项中but引导的简单句省略了主语，请问老师什么时候这个并列连词引导的简单句的主语是可以省略的，什么时候是不能省略的？是否并列连词前后主语一致的时候就可以省略，比如She cut her knee badly, but didn't cry； 是否并列连词前后句的谓语一致的时候，也可以省略后句的谓语，比如We study English and they Japanese. 谢谢！
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[Undefined]

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Which of the following, if true, best explains the fact that sleep-deprivation is not used as a treatment for depression?
这道题不是很理解，我只能大致明白答案需要一个sleep-deprivation的缺陷，但选项都不是很理解
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[GWD]

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In1852 Robert Angus Smith published a detailed report
of the chemistry of rain kin a large area around the city of
Manchester, England ,noting that the closer one came to
town, the more the city air would become increasingly acidic
这题目中prep给出的标准答案是B，我的做题方法是：noting后面说的是一件事情后面跟that会比较好，所以先排除E，D中 the closer one was to town，was用法不对，C中的coming的逻辑主语不对。在AB中，我选了Athe closer xxx，the more的这种逻辑结构，请老师解释一下AB
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The explanation offered above for the low esteem in which scientific popularizers are held by research scientists assumes that
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