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题目：

In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing many more prescriptions for higher-cost drugs.

选项:

A、a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing
B、a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing
C、a phenomenon occurring not just because of drugs that are becoming more expensive but because of doctors having also written
D、which occurred not just because drugs are becoming more expensive but doctors are also writing
E、which occurred not just because of more expensive drugs but because doctors have also written

答案:

B
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题目：

Australian embryologists have found evidence that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving as a kind of snorkel.

选项:

A、that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving
B、that has suggested the elephant descended from an aquatic animal, its trunk originally evolving
C、suggesting that the elephant had descended from an aquatic animal with its trunk originally evolved
D、to suggest that the elephant had descended from an aquatic animal and its trunk originally evolved
E、to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved

答案:

E
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题目：

Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.

选项:

A、as a method of the extraction of minerals, it was well established
B、as a method of the extraction of minerals well established
C、was a well-established method of mineral extraction
D、was a well-established method of extracting mineral that was
E、had been a method of mineral extraction, well established

答案:

C
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题目：

The proliferation of so-called cybersquatters, people who register the Internet domain names of high-profile companies in hopes of reselling the rights to those names for a profit, led to passing the Anti-Cybersquatting Consumer Protection Act in 1999, allowing companies to seek up to $100,000 in damages against those who register domain names with the sole intent of selling them later.

选项:

A、 passing the Anti-Cybersquatting Consumer Protection Act in 1999, allowing companies to seek up to $100,000 in damages against those who register domain names with the sole intent of selling
B、 the passage of the Anti-Cybersquatting Consumer Protection Act in 1999, which allows companies to seek up to $100,000 in damages against those who register domain names with the sole intent that they will sell
C、 the passage in 1999 of the Anti-Cybersquatting Consumer Protection Act, which allows companies to seek up to $100,000 in damages against those who register domain names with the sole intent of selling
D、 the Anti-Cybersquatting Consumer Protection Act, which was passed in 1999, and it allows companies to seek up to $100,000 in damages against those who register domain names with the sole intent to sell
E、 the Anti-Cybersquatting Consumer Protection Act, passed in 1999 and allowing companies to seek up to $100,000 in damages against those who register domain names with the sole intent of selling

答案:

C
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题目：

Although the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its sales at restaurants open for more than a year have declined.

选项:

A、the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its
B、the restaurant company has recently added many new restaurants across the country and its sales increased dramatically, its
C、many new restaurants have recently been opened across the country and its sales increased dramatically, the restaurant company's
D、having recently added many new restaurants across the country and with its sales increasing dramatically, the restaurant company's
E、recently adding many new restaurants across the country and having its sales increase dramatically, the restaurant company's

答案:

A
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题目：

A new study suggests that the conversational pace of everyday life may be so brisk it hampers the ability of some children for distinguishing discrete sounds and words and, the result is, to make sense of speech.

选项:

A、it hampers the ability of some children for distinguishing discrete sounds and words and, the result is, to make
B、that it hampers the ability of some children to distinguish discrete sounds and words and, as a result, to make
C、that it hampers the ability of some children to distinguish discrete sounds and words and, the result of this, they are unable to make
D、that it hampers the ability of some children to distinguish discrete sounds and words, and results in not making
E、as to hamper the ability of some children for distinguishing discrete sounds and words, resulting in being unable to make

答案:

B
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Community activist:  If Morganville wants to keep its central shopping district healthy, it should prevent the opening of a huge SaveAll discount department store on the outskirts of Morganville.  Records from other small towns show that whenever SaveAll has opened a store outside the central shopping district of a small town, within five years the town has experienced the bankruptcies of more than a quarter of the stores in the shopping district.
 
The answer to which of the following would be most useful for evaluating the community activist's reasoning?

选项:

A、Have community activists in other towns successfully campaigned against the opening of a SaveAll store on the outskirts of their towns?
B、Do a large percentage of the residents of Morganville currently do almost all of their shopping at stores in Morganville?
C、In towns with healthy central shopping districts, what proportion of the stores in those districts suffer bankruptcy during a typical five-year period?
D、What proportion of the employees at the SaveAll store on the outskirts of Morganville will be drawn form Morganville?
E、Do newly opened SaveAll stores ever lose money during their first five years of operation?

答案:

C
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题目：

Researchers in Germany have unearthed 400,000-year-old wooden spears from what it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who systematically hunted big game much earlier than believed.

选项:

A、it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who
B、it appears had been an ancient lakeshore hunting ground and is stunning evidence that human ancestors
C、it appears to have been an ancient lakeshore hunting ground and is stunning evidence that human ancestors
D、appears to be an ancient lakeshore hunting ground, stunning evidence that human ancestors
E、appears that it is an ancient lakeshore hunting ground, stunning evidence of human ancestors who

答案:

D
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题目：

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

选项:

A、have to know a great deal more than now about the social and economic
B、have to know a great deal more than they do now about the social and economical
C、would have to know a great deal more than they do now about the social and economical
D、would have to know a great deal more than they do now about the social and economic
E、would have to know a great deal more than now about the social and economic

答案:

D
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题目：

In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.

选项:

A、 for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve
B、 for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
C、 in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving
D、 to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve
E、 to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving

答案:

D
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[Undefined]

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Art historian: Unlike many artistic traditions that sought to depict plants native to the local area in a seasonally appropriate way (for example, depicting scenes of spring with the plants in the appropriate stages of development for that season), seventeenth-century Dutch artists specializing in flower paintings almost exclusively chose to depict exotic species of flowers from outside the local area. Painting such species was worthwhile primarily because the art-buying public had developed a strong preference for images of the exotic. The great botanical centers of the time gave the artists direct access to such flowers, which the artists would freely combine in a single painting, regardless of whether the combined species occurred together in the wild, and depicted each in full bloom, regardless of whether those species bloomed at the same time in nature.

Statement: The art historian makes the point that the species of flowers these Dutch artists chose to paint were 1 largely because the species were 2 .

Select for 1 and for 2 the options that complete the statement so that it is most strongly supported by the information provided. Make only two selections, one in each column.
我选的CE，和EC有什么区别？怎么选出EC的？
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An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984.  Thus, it is evident that major eruptions cause the atmosphere to become cooler than it would be otherwise.
Which of the following statements, if true, most seriously weakens the argument above?
C选项为什么就不会有张冠李戴的问题呢，1984和1982的气候情况能一样吗，C里的火山就可以试用于原文的火山吗
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[Undefined]

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The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
为什么这个题一定是相乘不能是相加呢？y=k1A方-k2B （k1,k2大于0 ），也满足题目说的与A方成正比与B成反比啊？但是这道题只有相乘的情况才能选出正确答案
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Tiger beetles are such fast runners that they can capture virtually any nonflying insect.  However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack.  Perhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.
 
Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?
答案C是怎么支持一个猜想又削弱另一个猜想的？
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[GWD]

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The author of the passage implies that which of the following is a possible partial explanation for acquisition behavior during the 1970's and 1980's?
请解释这道题为什么不选C或E，除了正确选项B，我认为文中也正确地提到了这两个选项可以解释acquisition behavior during 1970s and 80s
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[OG]

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The primary purpose of the passage is to
为什么选E不选B
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[Undefined]

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Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members?
提问小梅老师 这道题求讲一下 我没什么思路 带入数字得的是3
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A photography dealer ordered 60 Model X cameras to be sold for $250 each, which represents a 20 percent markup over the dealer's initial cost for each camera. Of the cameras ordered, 6 were never sold and were returned to the manufacturer for a refund of 50 percent of the dealer's initial cost. What was the dealer's approximate profit or loss as a percent of the dealer's initial cost for the 60 cameras?
请问小梅老师 这道题讲讲一下 我算的是19% 原来成本是200每个 亏了6个 每个亏100. 最后得不出答案
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Analytical!
请问may老师，这题该用什么思路来做？
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Analytical!
请问张老师，这道题为什么D不对？我有我觉得second paragraph最后一句话特别指向D
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