A good question to ponder about:
163.Because Halleys comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.
(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes
from 1000 SC...
1-After several years of rapid growth, the health care company became one of the largest health
care providers in the metropolitan area, while it then proved unable to handle the increase in
business, falling months behind in its payment to doctors and hospitals.
A. while it then proved unable to handle the increase in business, falling months behind in its
payment to
B. while it then proved unable to handle the increase in business and fell months behind in its
payment to
C. but then it proved unable to handle the increase in business, falling months behind in its paying
D. but then proving unable to handle the increase in business, falling months behind in paying
E. but then proved unable to handle the increase in business, falling months behind in paying
2-Tom Bradley was mayor of Los Angeles from 1973 to 1993, an era when the city had
transformed from a collection of suburban neighborhoods to the second-largest city in the United
States.
A. an era when the city had transformed
B. an era during which the city was transformed
C. an era that transformed it
D. during which era the city transformed
E. during which the city was transformed
1- how to decide bw E & C. how is C wrong?
2- how to decide bw B & E. how E is wrong?
correct construction is between X and Y...
so my take is :(E) as it passes
1-Recent findings lend strong support to the theory that a black hole lies at the center of the Milky
Way and of many of the 100 billion other galaxies estimated to exist in the universe.
A. that a black hole lies at the center of the Milky Way and of
B. that a black hole lies at the Milky Way's center and
C. that there is a black hole lying at the Milky Way's center and
D. of a black hole lying at the Milky Way's center and
E. of a black hole that lies at the center of the Milky Way and of
2-For many revisionist historians, Christopher Columbus has come to personify devastation and
enslavement in the name of progress that has decimated native peoples of the Western
Hemisphere.
A. devastation and enslavement in the name of progress that has decimated native peoples of the
Western Hemisphere
B. devastation and enslavement in the name of progress by which native peoples of the Western
Hemisphere decimated
C. devastating and enslaving in the name of progress those native peoples of the Western
Hemisphere which in the name of progress are decimated
D. devastating and enslaving those native peoples of the western Hemisphere which in the name of
progress are decimated
E. the devastation and enslavement in the name of progress that have decimated the native peoples
of the Western Hemisphere
3-Until recently, the Inuit people led a nomadic existence, sheltering in igloos, the ice-block domes
that are peculiar to north-central Canada, and in structures made of stones, bones, driftwood, and
skins.
A. Until recently, the Inuit people led a nomadic existence, sheltering
B. During recent times, the Inuit people lead a nomadic existence, sheltering
C. In the times that are recent, the Inuit people led a nomadic existence, sheltered
D. Up until recently, the Inuit people, leading a nomadic existence, have sheltered
E. Until recent times, leading a nomadic existence, the Inuit people were sheltered
Doubts
q1-Explain your reasoning.Why E is wrong
q2-BW A & E what to choose and why?
q3- Explain ur reasoning
Q2 - Though the official answer is B, i would still go or E as it is more concise.In E during which also refers to the time period between 1973 to 1993...while "an era during which" also refers to the same thing.o why not choose E.
In some forums it is given that the clause "an era..." acts as an Appositive modifier modifying Time period
an era during which ... Hope to avoid such questions...:)
Dude,
Q1. Option A is right in this q.
E has a very subtle meaning change. If you look at the original stem, it says the findings lend support to the theory of a black hole LYING at the center of milky way and other galaxies. So, the theory is supporting the process of something lying at the center.
While, E says: findings lend support to the theory of black hole THAT lies at blah blah ........essentially, it means that we already knew that a black hole exists at the center. We just want to confirm whether it is the same black hole or not or whether it is actually a black hole and not a white hole 😛
Q2. Between A and E, the issue is of a SV agreement, it is not very cleat what "that" modifies in the original stem. If you go with the rule, then that modifies progress, hence A
but logically this doesnt make sense, the decimation and enslavement is plural noun, hence E
Confusing !! What's the OA
Will solve the 3rd one later.. gotta rush !!
Q3.
Option A is the correct one. sheltering in igloos is an adverbial modifier and answers HOW the intuit people have led xxxx
Option B - During needs a definite time frams
C - BAD BAD sentence
D - not too sure why this is wrong
E - passive voice and tense issue.
I found the explanation for D on one of the forums:
PROBLEM: The "up" is unnecessary. The present perfect tense starts in the past and continues into the present. But the use of "until recently" implies that this has stopped, so the present perfect doesn't work.
HTH !
1-Recent findings lend strong support to the theory that a black hole lies at the center of the Milky
Way and of many of the 100 billion other galaxies estimated to exist in the universe.
A. that a black hole lies at the center of the Milky Way and of
B. that a black hole lies at the Milky Ways center and
C. that there is a black hole lying at the Milky Ways center and
D. of a black hole lying at the Milky Ways center and
E. of a black hole that lies at the center of the Milky Way and of
2-For many revisionist historians, Christopher Columbus has come to personify devastation and
enslavement in the name of progress that has decimated native peoples of the Western
Hemisphere.
A. devastation and enslavement in the name of progress that has decimated native peoples of the
Western Hemisphere
B. devastation and enslavement in the name of progress by which native peoples of the Western
Hemisphere decimated
C. devastating and enslaving in the name of progress those native peoples of the Western
Hemisphere which in the name of progress are decimated
D. devastating and enslaving those native peoples of the western Hemisphere which in the name of
progress are decimated
E. the devastation and enslavement in the name of progress that have decimated the native peoples
of the Western Hemisphere
3-Until recently, the Inuit people led a nomadic existence, sheltering in igloos, the ice-block domes
that are peculiar to north-central Canada, and in structures made of stones, bones, driftwood, and
skins.
A. Until recently, the Inuit people led a nomadic existence, sheltering
B. During recent times, the Inuit people lead a nomadic existence, sheltering
C. In the times that are recent, the Inuit people led a nomadic existence, sheltered
D. Up until recently, the Inuit people, leading a nomadic existence, have sheltered
E. Until recent times, leading a nomadic existence, the Inuit people were sheltered
Doubts
q1-Explain your reasoning.Why E is wrong
q2-BW A & E what to choose and why?
q3- Explain ur reasoning
ANS1: A
ANS2: E...The progress is not modified rather "the devastation and enslavement " which has been modified.How can progress decimate native people?.....Inclusion of the article "the" preceding "devastation and enslavement" draws the reference of "that" away from "progress,plural verb "have decimated" correctly treats "the devastation and enslavement" as the plural subject ...the use of the is necessary as it emphasises on "devastation and enslavement" brought about by Columbus in a specific way.
Also option A has S-V disagreement."devastation and enslavement in the name of progress that has "...should be have...
ANS3:A
OA is A
According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.
(A) minority graduates are nearly four times more likely than are other graduates in planning to practice
(B) minority graduates are nearly four times more likely than other graduates who plan on practicing
(C) minority graduates are nearly four times as likely as other graduates to plan on practicing
(D) it is nearly four times more likely that minority graduates rather than other graduates will plan to practice
(E) it is nearly four times as likely for minority graduates than other graduates to plan to practice
Hi is this sentence not creating a run-on (comma splice) ..... 
According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.
(A) minority graduates are nearly four times more likely than are other graduates in planning to practice
(B) minority graduates are nearly four times more likely than other graduates who plan on practicing
(C) minority graduates are nearly four times as likely as other graduates to plan on practicing
(D) it is nearly four times more likely that minority graduates rather than other graduates will plan to practice
(E) it is nearly four times as likely for minority graduates than other graduates to plan to practice
Hi is this sentence not creating a run-on (comma splice) .....
Hi, IMO C. --B is incorrect because it says "minority graduates are nearly four times more likely" --- more likely "What?" - the use of "who" point to "other graduates".. Hence it is somewhat incomplete.
C is a complete sentence- clearly states the intended meaning.
Other options: - A -- " in planning to practice" is incorrect
D is unidiomatic. the correct idiom is "'A is X times more likely to happen than is B." -- this "is" is used to remove the ambiguity.
Hope I am clear. :)
No the question is correct...the first part is a subordinate clause separated by a comma from the ,main clause...
anilkumar1510 SaysAs i see "According ...." is a clause separated with comma from another clause "majority ...." or whichever option you choose ....... so is this qstin incorrect ........
Anyone facing problem in sentence correction. Just go through sc grail from aristotle
Must have for GMAT aspirants
If you don't have PM me, i'll mail it to u 
Just a minor correction. First part is not a "clause" at all. It is a "phrase".
This is not just nitpicking, but something that is important from GMAT perspective. One should be absolutely comfortable with differentiating between phrases and clauses, since it is used in multiple areas such as sentence fragments and comma splices, among others.
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Thanks,
Ashish
GMAT Faculty @ EducationAisle
GMAT - 99th Percentile, MBA - ISB
Defense attorneys have occasionally argued that their clients misconduct stemmed from a reaction to something ingested , but in attributing criminal or delinquent behavior to some food allergy ,the perpetrators are in effect told that they are not responsible for their reactions .
a)in attributing criminal or delinquent behavior to some food allergy.
b)if criminal or delinquent behavior is attributed to an allergy to some food.
c)in attributing behavior that is criminal or delinquent to an allergy to some food.
d)if some food allergy is attributed as the cause of criminal or delinquent behavior
e)in attributing a food allergy as the cause of criminal or delinquent behavior.
Defense attorneys have occasionally argued that their clients misconduct stemmed from a reaction to something ingested , but in attributing criminal or delinquent behavior to some food allergy ,the perpetrators are in effect told that they are not responsible for their reactions .
a)in attributing criminal or delinquent behavior to some food allergy.
b)if criminal or delinquent behavior is attributed to an allergy to some food.
c)in attributing behavior that is criminal or delinquent to an allergy to some food.
d)if some food allergy is attributed as the cause of criminal or delinquent behavior
e)in attributing a food allergy as the cause of criminal or delinquent behavior.
Defense attorneys have occasionally argued that their clients' misconduct stemmed from a reaction to something ingested , but in attributing criminal or delinquent behavior to some food allergy ,the perpetrators are in effect told that they are not responsible for their reactions .
a)in attributing criminal or delinquent behavior to some food allergy.
b)if criminal or delinquent behavior is attributed to an allergy to some food.
c)in attributing behavior that is criminal or delinquent to an allergy to some food.
d)if some food allergy is attributed as the cause of criminal or delinquent behavior
e)in attributing a food allergy as the cause of criminal or delinquent behavior.
In the main, incidents of breakdowns in nuclear reactors have not resulted from lapses of high technology but commonplace inadequacies in plumbing and wiring.
(A) not resulted from lapses of high technology but
(B) resulted not from lapses of high technology but from
(C) resulted from lapses not of high technology but
(D) resulted from lapses not of high technology but have stemmed from
(E) resulted not from lapses of high technology but have stemmed from