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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
20答疑

[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
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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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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725浏览

[Undefined]

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The type of behavior exhibited when an animal recognizes itself in a mirror comes within the domain of “theory of mind,” thus is best studied as part of the field of animal cognition.

请问这题是如何选到D的，thus后面省略了哪一部分的语法结构？
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3313浏览

[Undefined]

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Industry analysts said that the recent rise in fuel prices may be an early signal of the possibility of gasoline and heating oil prices staying higher than usually through the end of the year.

这道题杀选项的思路是因为前面有maybe杀掉了ABD，一句话不好重复出现两次表达可能性的表述: possibility 或 could。C里面of price的修饰关系明显不对。请问老师这样的思路是否可以？
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607浏览

[Undefined]

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The author of the passage refers to Pliny most probably in order to
OG2020,542题。本题在A和D中徘徊，最后选了A。能读懂P是在众多misunderstanding中拨云见日，提出了正确观点，但是还是选错，是不是因为对题干中in order to的理解不到位？因为后面讲了对resin的误解，所以我类比下来后选了A，因为A里面也提到了误解。我的理解为什么错？（另外不太认同OG后面对A选项的解析）
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1278浏览

[OG]

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According to the passage, the research mentioned in line 6 suggests which of the following about lower-ranked top executives and postacquisition success?
OG2020,486题，我在A和C选项中徘徊，最后选了A。回头看，C确实比A的范围大，OG解析里面说没有提到retention efforts的事儿，但是原文那句话的意思里面确实说了retain top高管low高管对收购成功更有效。为什么A错？
1评分
1015浏览

[Undefined]

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Despite recent increases in sales and cash flow that have propelled automobile companies' common stocks to new highs, several industry analysts expect automakers, in order to conserve cash, to set dividends more conservatively than they were.
请老师帮忙解释以下B与C的区别。曼哈顿RON的解释如下（但是看不太懂）：let me have a go at it, in simpler language: whenever you use a parallel structure with omitted/elided words, the EXACT omitted word(s) MUST be present, IN PARALLEL STRUCTURE, elsewhere in the sentence. this means in exactly the same form - no alterations, no tense changes, no nothing. this kills choice (b). that choice ends with "...than they have been", which omits a participle: in other words, it's actually "...than they have been ______", where the ______ is clearly seen to be setting (dividends). since the EXACT WORD setting doesn't appear anywhere else in this sentence, the sentence is incorrect. by contrast, choice (c) is a-ok on this point. this choice also contains "...than they have been (__________)", where the parallel concept, "(more) conservative", actually appears elsewhere in the sentence.说是忽略了分词setting。啥意思？不懂……
1评分
6549浏览

[OG19]

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Technically, “quicksand” is the term for sand that is so saturated with water as to acquire a liquid's character.
OG2020,815.错选了D。为什么上来就排除了CDE？我从句意上理解没有排除
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4307浏览

[GWD]

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Over the next few years, increasing demands on the Chattahoochee River, which flows into the Apalachicola River, could alter the saline content of Apalachicola Bay, which would rob the oysters there of their flavor, and to make them decrease in size, less distinctive, and less in demand.
OG2020，810。这题我选的C，题目主语谓语我都找出来了，increasing demands could alter...,然后我想的是later和rob并列，making表示rob后的结果，而且making后面decrease in size，less distinctive and less demand我觉得也是并列的。请问为什么错？
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5180浏览

[OG19]

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Normally a bone becomes fossilized through the action of groundwater, which permeates the bone, washes away its organic components, and replaces them with minerals.
OG2020 804。昨天提问错了，纠结的是A和E选项，麻烦老师解释下E为什么不对。按照Tina老师讲的ing的两个条件，（主语能发出这样的动作，主句整句能发出这样的动作）为什么不选E？
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1549浏览

[GWD]

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An international team of astronomers working at telescopes in the Canary Islands and Spain has detected at least 18 huge gas spheres estimated to have 5 to 15 times the mass of Jupiter, the solar system's largest planet.
C having detected 不可以看作 svo，doing一个结果成分不行吗
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6619浏览

[OG19]

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Technically, “quicksand” is the term for sand that is so saturated with water as to acquire a liquid's character.
想请问b，没有指代不清吗？it既可以指代sand又可以指代quicksand，water。
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