Critical Reasoning from
GMAT Prep
Compiled from GMAT Prep
连七对Disclaimer:
I have not written any of the content that is prented in this document. This is merely a compilation of all the GMAT Prep CR questions that have been posted on the GMAT Club
forums. Don’t sue me! The questions are all linked back to the threads in either GMAT Club
or in the Manhattan GMAT forums wherever applicable. Inference Questions include reasoning questions as well.
The answers can be found at the end of the document. Explanations from the MGMAT
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forums or GMAT Club forums wherever necessary can be accesd by clicking on the link
with the Question. The letter in the parenthesis at the right side of the Question indicates the
Question Type.
The latest version of this document can be accesd at:
GMAT Prep CR Document
Question 1: (W)
Inct Infestations in certain cotton growing regions of the world have caud dramatic increas of cotton on the world market. Knowing that cotton plants mature quickly, many soybean growers in Ortovia plan to cea growing soybeans, the price of which has long been stable and to begin raising cotton instead, thereby taking advantage of the high price of cotton to increa their income significantly over the next veral years.
Which of the following, if true, most calls into question the reasoning on which the plan is bad?
A.The cost of raising soybeans has incread significantly over the past veral years
and is expected to continue to climb.
B.Tests of a newly developed, inexpensive pesticide have shown it to be both
environmentally safe and effective against the incts that have infected the cotton crops.
C.In the past veral years, there has been no sharp increa in the demand for cotton,
and for goods made out of cotton.
D.Many consumers consider cotton cloth a necessity rather than a luxury and would be
willing to pay significantly higher prices for cotton goods than they are currently paying
E.The species of inct that has infested the cotton plants has never been known to
infest soybean plants
Question 2: (W)
Jennifer: Video rental outlets in Centerville together handled 10,000 fewer video rentals in 1994 than in 1993. The decline in rentals was probably due almost entirely to the February 1994 opening of Videorama, the first and only video rental outlet in the area that, in addition to renting videos, also sold them cheaply.
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Brad: There must be another explanation: as you yourlf said, the decline was on the order of 10,000 rentals. Yet Videorama sold only 4,000 videos in 1994.
Which of the following, if true, would most riously weaken the force of the objection that Brad prents to Jennifer's explanation?
A.In 1994 Videorama rented out more videos than it sold.
B.In 1994 two new outlets that rent but that do not ll videos opened in Centerville.
C.Most of the video rental outlets in Centerville rent videos at a discount on certain
nights of the week.
D.People often buy videos of movies that they have previously en in a theater.
E.People who own videos frequently loan them to their friends.
考驾驶证科目一Question 3: (W)
Although fullerenes - spherical molecules made entirely of carbon - were first found in the laboratory,
they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test ca for evaluating hypothesis about the state of the Earth's crust at the time the naturally occurring fullerenes were formed.
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Which of the following, if true, most riously undermines the argument?
A.Confirming that the shungite genuinely contained fullerenes took careful
experimentation
B.Some fullerenes have also been found on the remains of a small meteorite that
collided with a spacecraft.
C.The mineral shungite itlf contains large amounts of carbon, from which the
fullerenes apparently formed.
D.The naturally occurring fullerenes are arranged in a previously unknown crystalline
structure
E.Shungite itlf is formed only under distinctive conditions.
Question 4: (I)
Finding of a survey of Systems magazine subscribers: Thirty percent of all merchandi orders placed by subscribers in respon to advertiments in the magazine last year were placed by subscribers under age thirty-five.
Finding of a survey of advertirs in Systems magazine: Most of the merchandi orders placed in respon to advertiments in Systems last year were placed by people under age thirty-five.
For both of the findings to be accurate, which of the following must be true?
A.More subscribers to Systems who have never ordered merchandi in respon to
advertiments in the magazine are age thirty-five or over than are under age thirty-five.
B.Among subscribers to Systems, the proportion who are under age thirty-five was
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considerably lower last year than it is now.
C.Most merchandi orders placed in respon to advertiments in Systems last year
were placed by Systems subscribers over age thirty-five.
D.Last year, the average dollar amount of merchandi orders placed was less for
subscribers under age thirty-five than for tho aged thirty-five or over.
E.Last year many people who placed orders for merchandi in respon to
advertiments in Systems were not subscribers to the magazine.
Question 5: (W)
A major impediment to wide acceptance of electric vehicles even on the part of people who u their cars almost exclusively for commuting is the inability to u their electric vehicles for occasional extended trips. In an attempt to make purchasing electric vehicles more attractive to commuters, one electric vehicle producer is planning to offer customers three days free rental of a conventional car for every 1,000 miles that they drive their electric vehicle.
Which of the following, if true, most threatens the plan's prospects for success?
电动木马A.Many electric vehicles that are ud for commercial purpos are not needed for
extended trips.
B.Becau a majority of commuters drive at least 100 miles per week, the cost of the
producer of making good the offer would add considerably to the already high price of electric vehicles.
C.The relatively long time it takes to recharge the battery of an electric vehicle can
easily be fitted into the regular patterns of car u characteristic of commuters.
D.Although electric vehicles are esntially emission- free in actual u, generating the
electricity necessary for charging an electric vehicle's battery can burden the environment.
E.Some family vehicles are ud primarily not for commuting but for making short local
trips, such as to do errands.
Question 6: (S)
Until now only injectable vaccines against influenza have been available. They have been primarily ud by older adults who are at risk for complications from influenza. A new vaccine administered in a nasal spray form has proven effective in preventing influenza in children. Since children are significantly more likely than adults to contract and spread influenza, making the new vaccine widely available for children will greatly reduce the spread of influenza across the population.
Which of the following, if true, most strengthens the argument?
A.If a person receives both the nasal spray and the injectable vaccine, they do not interfere
with each other.
远近闻名的拼音B.The new vaccine us the same mechanism to ward off influenza as injectable vaccines
do.
C.Government subsidies have kept the injectable vaccines affordable for adults.
D.Of the older adults who contract influenza, relatively few contract it from children with
influenza.
E.Many parents would be more inclined to have their children vaccinated against influenza
if it did not involve an injection.
