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题目：

In an attempt to guarantee the security of its innovative water purification method, the company required each employee to sign a confidentiality agreement prohibiting that its water purification methods be disclosed to companies using an analogous purification process.

选项:

A、prohibiting that its water purification methods be disclosed to companies
B、prohibiting them from the disclosing of its water purification methods to any company
C、prohibiting disclosure of its water purification methods to any company
D、that would prohibit them from disclosure of its water purification methods to companies
E、that would prohibit its water purification methods to be disclosed to a company

答案:

C
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题目：

Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"—at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.

选项:

A、at some time in the past our ancestors suffered an event, greatly reducing their numbers
B、that at some time in the past our ancestors suffered an event that greatly reduced their numbers
C、that some time in the past our ancestors suffered an event so that their numbers were greatly reduced,
D、some time in the past our ancestors suffered an event from which their numbers were greatly reduced
E、some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,

答案:

B
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题目：

Although the discount stores in Goreville's central shopping district are expected to close within five years as a result of competition from a SpendLess discount department store that just opened, those locations will not stay vacant for long.  In the five years since the opening of Colson's, a nondiscount department store, a new store has opened at the location of every store in the shopping district that closed because it could not compete with Colson's.
 
Which of the following, if true, most seriously weakens the argument?

选项:

A、Many customers of Colson's are expected to do less shopping there than they did before the SpendLess store opened.
B、Increasingly, the stores that have opened in the central shopping district since Colson's opened have been discount stores.
C、At present, the central shopping district has as many stores operating in it as it ever had.
D、Over the course of the next five years, it is expected that Goreville's population will grow at a faster rate than it has for the past several decades.
E、Many stores in the central shopping district sell types of merchandise that are not available at either SpendLess or Colson's.

答案:

B
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题目：

In general, jobs are harder to get in times of economic recession because many businesses cut back operations.  However, any future recessions in Vargonia will probably not reduce the availability of teaching jobs at government-funded schools.  This is because Vargonia has just introduced a legal requirement that education in government-funded schools be available, free of charge, to all Vargonian children regardless of the state of the economy, and that current student-teacher ratios not be exceeded.
 
Which of the following, if true, most strengthens the argument?

选项:

A、The current student-teacher ratio at Vargonia's government-funded schools is higher than it was during the most recent period of economic recession.
B、During recent periods when the Vargonian economy has been strong, almost 25 percent of Vargonian children have attended privately funded schools, many of which charge substantial fees.
C、Nearly 20 percent more teachers are currently employed in Vargonia's government-funded schools than had been employed in those schools in the period before the last economic recession.
D、Teachers in Vargonia's government-funded schools are well paid relative to teachers in most privately funded schools in Vargonia, many of which rely heavily on part-time teachers.
E、During the last economic recession in Vargonia, the government permanently closed a number of the schools that it had funded.

答案:

B
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题目：

In the mid-1970's, since birds were overcome by pollution, and routinely falling from the sky above Los Angeles freeways, this prompted officials in California to devise a plan that reduced automobile emissions.

选项:

A、since birds were overcome by pollution, and routinely falling from the sky above Los Angeles freeways, this prompted officials in California to devise a plan that reduced
B、since birds that had been overcome by pollution were routinely falling from the sky above Los Angeles freeways, it prompted officials in California to devise a plan that would reduce
C、birds had been overcome by pollution and routinely fell from the sky above Los Angeles freeways, prompting officials in California to devise a plan that reduced
D、birds overcome by pollution routinely fell from the sky above Los Angeles freeways, prompting officials in California to devise a plan to reduce
E、birds overcome by pollution and routinely falling from the sky above Los Angeles freeways were prompting officials in California to devise a plan to reduce

答案:

D
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题目：

Press Secretary:  Our critics claim that the President's recent highway project cancellations demonstrate a vindictive desire to punish legislative districts controlled by opposition parties.  They offer as evidence the fact that 90 percent of the projects canceled were in such districts.  But all of the canceled projects had been identified as wasteful in a report written by respected nonpartisan auditors.  So the President's choice was clearly motivated by sound budgetary policy, not partisan politics.
 
Which of the following is an assumption on which the press secretary's argument depends?

选项:

A、Canceling highway projects was not the only way for the President to punish legislative districts controlled by opposition parties.
B、The scheduled highway projects identified as wasteful in the report were not mostly projects in districts controlled by the President's party.
C、The number of projects canceled was a significant proportion of all the highway projects that were to be undertaken by the government in the near future.
D、The highway projects canceled in districts controlled by the President's party were not generally more expensive than the projects canceled in districts controlled by opposition parties.
E、Reports by nonpartisan auditors are not generally regarded by the opposition parties as a source of objective assessments of government projects.

答案:

B
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题目：

The budget for education reflects the administration's demand that the money is controlled by local school districts, but it can only be spent on teachers, not on books, computers, or other materials or activities.

选项:

A、 the money is controlled by local school districts, but it can only be spent
B、 the money be controlled by local school districts, but it allows them to spend the money only
C、 the money is to be controlled by local school districts, but allowing it only to be spent
D、 local school districts are in control of the money, but it allows them to spend the money only
E、 local school districts are to be in control of the money, but it can only spend it

答案:

B
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题目：

The Achaemenid empire of Persia reached the Indus Valley in the fifth century B.C., bringing the Aramaic script with it, from which was derived both northern and southern Indian alphabets.

选项:

A、 the Aramaic script with it, from which was derived both northern and
B、 the Aramaic script with it, and from which deriving both the northern and the
C、 with it the Aramaic script, from which derive both the northern and the
D、 with it the Aramaic script, from which derives both northern and
E、 with it the Aramaic script, and deriving from it both the northern and

答案:

C
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题目：

Sulfur dioxide, a major contributor to acid rain, is an especially serious pollutant because it diminishes the respiratory system's ability to deal with all other pollutants.

选项:

A、an especially serious pollutant because it diminishes the respiratory system's ability to deal
B、an especially serious pollutant because of diminishing the respiratory system's capability of dealing
C、an especially serious pollutant because it diminishes the capability of  the respiratory system in dealing
D、a specially serious pollutant because it diminishes the capability of  the respiratory system to deal
E、a specially serious pollutant because of diminishing the respiratory system's ability to deal

答案:

A
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题目：

In 1981 children in the United States spent an average of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly sixhours a week.

选项:

A、chores; by 1997 they had spent nearly six hours a week
B、chores; by 1997 that figure had grown to nearly six hours a week
C、chores, whereas nearly six hours a week were spent in 1997
D、chores, compared with a figure of nearly six hours a week in 1997
E、chores, that figure growing to nearly six hours a week in 1997

答案:

B
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[Undefined]

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Analytical!
怎么解出
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[OG20]

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For each of the following statements concerning the works in this sample, select Yes if the statement is supported by the information provided; otherwise, select No.
第三小问选了yes 请问为什么是no
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[OG20]

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For each of the following statements about the oils in the table, select Yes if the statement accurately reflects the information above. Otherwise, select No.
这题为什么选no 老师能不能讲一下整道题的完整思路 我怕我的思路不正确
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[OG20]

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For each statement, select Yes if the information given indicates it is true for the trees in the table. Otherwise, select No.
这个第二道题错了 题干中没有提到mode 题目中为什么突然出现？这是什么意思 是我漏看了吗
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[Undefined]

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Which of the following, if true, would most weaken Krech's objections to Martin's theory?
主要是BC选项，答案给的B我理解不了，我觉得选C，因为文中说K反对M理论排除了气候因素，K认为主要是气候影响，因为在end of Plei..发生了气候变化，C选项说 不止那一次气候变化，之前也发生过，正好削弱。而B选项说的小动物的部分，主要Nor 那句没太看懂，能帮助理解吗？
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[Official Advanced]

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A box of light bulbs contains exactly 3 light bulbs that are defective. What is the probability that a sample of light bulbs picked at random from this box will contain at least 1 defective light bulb?
  1. The light bulbs in the sample will be picked 1 at a time without replacement.
  2. The sample will contain exactly 20 light bulbs.
选的C 为啥合在一起也不对呀 因为box和sample不一样？
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[Undefined]

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In 2010, there were four used-car dealers in City Z. The graphic shows the monthly sales data for 2010 for two of those dealers as well as the citywide average for used-car dealers for those months. 
Based on the given information, use the drop-down menus to most accurately complete the following statements. 

问一下小梅老师 我觉得这道题第一小问应该选C more than 答案是不是错了？
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[Undefined]

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Analytical!
第二问里的most of 怎么界定啊，四个里有两个也能是most of 吗

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[Undefined]

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In the argument given, the two portions in boldface play which of the following roles?
老师我在B和E之间纠结，后面选了B，不知道generalization为什么不行，然后选项里面那个argument是要自己找出来的吗，是不是两个黑体字之间的那一段啊
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