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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
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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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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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The Anasazi settlements at Chaco Canyon were built on a spectacular scale with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.
这道语法题做的时候乱了，请老师讲一下
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The two oil companies agreed to merge their refining and marketing operations in the Midwest and the West, forming a new company for controlling nearly fifteen percent of the nation's gasoline sales.
我的做题思路： 首先根据for controlling 杀掉了A 和D 因为merge 这个动作不是为了control shares 而应该是一个结果或者伴随的状态。 杀掉C 是因为would form表示将来而controlled 已经是过去。语义上说不通。 B 和E 之间选择了E 因为感觉有从句读起来更舒服。老师能evaluate 一下我的这个做题思路哪里出问题了吗？违反了GMAC语法的哪个原则：是没有为对方着想，还是基础语法有问题，还是没有注意逻辑意思？ 谢谢
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When a ton of wheat was being moved from Buffalo to New York City before the opening of the Erie Canal in 1825, it took three weeks and cost $100, but when the canal was used, it took less than eight days and cost less than $6.
管老师，请问此题C中最后的the move让我理解成是之前的那个move，因为这是个特指嘛！我选的B，当然我也觉得B不太好，但是怎样才能觉得C更好点儿呢我倒是注意小词了，看来不注意也不行，太注意也不行？？
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Mary Wollstonecraft's A Vindication of the Rights of Woman (1792) was unprecedented in its firsthand accounts of the indignities suffered by women and because it was eloquent and passionate in exposing and criticizing these indignities.
Mary Wollstonecraft's A Vindication of the Rights of Woman (1792) was unprecedented in its firsthand accounts of the indignities suffered by women and because it was eloquent and passionate in exposing and criticizing these indignities. and because it was eloquent and passionate in exposing and criticizing and in that it was eloquent and passionate when exposing and criticizing as well as the eloquence and passion it had in exposing and criticizing and in the eloquence and passion with which it exposed and criticized but also its eloquent and passionate exposure and criticism of 这道题读下来,觉得BD逻辑都没问题.但是D用了个with，我总觉得with后面跟的东西是与主体行为在物理上相分离的东西，如用什么工具。而它的雄辩和激情应该与表述的动作融为一体的，或者是在表述中流露出来的。
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Capuchin monkeys in Venezuela often rub a certain type of millipede into their fur.  Secretions of these millipedes have been shown to contain two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate the capuchins.  The rubbing behavior is rare except during the rainy season, when mosquito populations are at their peak.  Therefore, the monkeys probably rub the millipedes into their fur because doing so helps protect them against mosquitoes.
 
Which of the following would it be most useful to determine in order to evaluate the argument?
做题时读到M会分泌两种化学物质之后后面的部分完全没明白，也不知道和前面究竟有什么联系，即使看到答案了也不明白为什么，请老师讲解！谢谢！
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Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes.  However, this method of eliminating competition cannot be profitable in the long run.  Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
有一些航空公司用低于成本的价格来打价格战，这种做法不能使的公司盈利。因为一旦再度抬高价格会使得原来的竞争对手有机会再度压低价格。 问驳斥原文的选项。 A说压低价格是合法的，这个是无关的。 B说航空公司之后遇到竞争者还是会继续降价，但是我认为没有说航空公司是否能盈利？（可能是我的认识有问题，驳斥argument是不是就是驳斥结论？） C说航空公司的价格是一个不太能持久保持的价格，是支持。 D面对降价，很多其他公司选择去换线路而不是去降价，这个是无关的。 E说尽管是降价，但是总的来说航空公司会因此获得客源的大幅增长，这个不是驳斥原文的吗？ 老师，请看一下我的思路有什么问题？
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The ecosystems of barrier islands are extremely vulnerable--whether from natural processes like shoreline recession, rising sea levels, and destructive hurricanes, or the ever-increasing pressures of development.
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Denoma, a major consumer-electronics maker, had a sizeable decline in sales revenue for its most recent fiscal year.  This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced.
 
Which of the following, if true, does most to explain the apparently surprising result?
 
没有录音的cr
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In 1960's studies of rats, scientists found that crowding increases the number of attacks among the animals significantly.  But in recent experiments in which rhesus monkeys were placed in crowded conditions, although there was an increase in instances of "coping" behavior—such as submissive gestures and avoidance of dominant individuals—attacks did not become any more frequent.  Therefore it is not likely that, for any species of monkey, crowding increases aggression as significantly as was seen in rats.
 
Which of the following, if true, most strengthens the argument?
捯
A.说的是生活在不拥挤环境下的猴子，原文没提，杀 B.说individual和nonindividual老鼠之间怎样，原文没提，杀 C.比较了r猴子和其他猴子回应agression行为的刺激物的范围。当时忘了原文结论是推广到了any species of monkey，说以就觉得没有关系，杀了 D.一部分实验的猴子和另一部分的比较，无关，杀了 E.R猴子copying的行为和它们结束这个争端的方式很像，这个读起来感觉像驳斥，但是之前的都排除了，所以就选了 老师请予以指教！！
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