Live GMAT classes with Target Test Prep start Nov 1 and Nov 21. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 1
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 1 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand5 seats leftStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Tough SC

Expert replies
Post new topic Locked
Subscribe topic
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 468
Joined: Sat Mar 03, 2007 10:17 pm
Thanked: 5 times
by moneyman » Mon Nov 24, 2008 5:55 am
check it out
You do not have the required permissions to view the files attached to this post.
Maxx
Top
Join the discussion
Source: — Sentence Correction |
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

by parallel_chase » Mon Nov 24, 2008 6:04 am
Rock samples........have been dated....and thus are

This eliminates A and B, incorrect usage of "has"

option D, "are" is missing. incorrect usage "thus evidence", We need a linking verb "are" to connect the subject "rock samples" with its verb "evidenced"

I would like to know if there are any other errors in D.

Option C changes the meaning, "dated to be"

Option E Clear and concise.

OA?
No rest for the Wicked....
Top
Join the discussion
Legendary Member
Posts: 940
Joined: Tue Aug 26, 2008 3:22 amFollowed by: 1 member
Thanked: 55 times

by iamcste » Mon Nov 24, 2008 6:46 am
parallel_chase wrote: I would like to know if there are any other errors in D.


Being is wordy

OA?
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 377
Joined: Wed Sep 03, 2008 9:30 amFollowed by: 2 members
Thanked: 15 times

by schumi_gmat » Mon Nov 24, 2008 10:30 am
ISnt the subordinate clause modifying the asteroid?

If true, then the verb should be singular.

I am little confused here. Can anyone please explain?
Top
Join the discussion
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

by parallel_chase » Mon Nov 24, 2008 10:37 am
schumi_gmat wrote:ISnt the subordinate clause modifying the asteroid?

If true, then the verb should be singular.

I am little confused here. Can anyone please explain?
First of all there is no subordinate clause. Indication of that is there is no comma,

Independent clauses are differentiated either through semi-colon or cordinating conjunction.

Subordinate clauses or phrases are always introduced with comma.

Coming to your question.

What can be dated here. Only "Rock samples taken from remains of asteroid"

Rock samples = plural, have= plural

Hope its clear.
Last edited by parallel_chase on Mon Nov 24, 2008 10:38 am, edited 1 time in total.
No rest for the Wicked....
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 458
Joined: Sun Aug 31, 2008 10:44 amFollowed by: 1 member
Thanked: 3 times

by gmat009 » Mon Nov 24, 2008 10:38 am
parallel_chase wrote:Rock samples........have been dated....and thus are

This eliminates A and B, incorrect usage of "has"

option D, "are" is missing. incorrect usage "thus evidence", We need a linking verb "are" to connect the subject "rock samples" with its verb "evidenced"

I would like to know if there are any other errors in D.

Option C changes the meaning, "dated to be"

Option E Clear and concise.

OA?
Can you explain why "dated to be" changes the meaning of sentence
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 377
Joined: Wed Sep 03, 2008 9:30 amFollowed by: 2 members
Thanked: 15 times

by schumi_gmat » Mon Nov 24, 2008 10:53 am
PC Wrote:
Subordinate clauses or phrases are always introduced with comma.
PC, my undersatnding was -

that introduces a restrictive clause and is never set off by comma.
This is the post i referred.


That v/s which
https://www.worldwidewords.org/articles/which.htm
Top
Join the discussion
Legendary Member
Posts: 940
Joined: Tue Aug 26, 2008 3:22 amFollowed by: 1 member
Thanked: 55 times

by iamcste » Mon Nov 24, 2008 11:07 am
schumi_gmat wrote:PC Wrote:
Subordinate clauses or phrases are always introduced with comma.
PC, my undersatnding was -

that introduces a restrictive clause and is never set off by comma.
This is the post i referred.


That v/s which
https://www.worldwidewords.org/articles/which.htm

Subordinate means non essential or non restrictive clauses. Such clauses are marked with commas

That is an essential or restrictive modiifer means its not subordinate/non-essential and hence no commas ( as you understood)


In the sentence, we have that meaning we have restrictive modifer and not subordinate or non essential modifier

hence, no commas are there


hence, you reference to that clause as subordinate is incorrect
Top
Join the discussion
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

by parallel_chase » Mon Nov 24, 2008 2:14 pm
There is one little exception to the rule that I mentioned.

If the subordinate clause is an adverb clause, introduced at the end of the sentence, comma is not used to separate it from the main clause.

Hope this helps.
No rest for the Wicked....
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 168
Joined: Thu Nov 13, 2008 4:34 am
Location: Pittsburgh
Thanked: 9 times

by Tryingmybest » Mon Nov 24, 2008 5:14 pm
OA PLZ?
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 458
Joined: Sun Aug 31, 2008 10:44 amFollowed by: 1 member
Thanked: 3 times

by gmat009 » Mon Nov 24, 2008 7:32 pm
parallel_chase wrote:There is one little exception to the rule that I mentioned.

If the subordinate clause is an adverb clause, introduced at the end of the sentence, comma is not used to separate it from the main clause.

Hope this helps.
Can you explain why "dated to be" changes the meaning of sentence
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 468
Joined: Sat Mar 03, 2007 10:17 pm
Thanked: 5 times

by moneyman » Tue Nov 25, 2008 12:25 am
OA is E

What is wrong with "dated to be" ?
Maxx
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 468
Joined: Sat Mar 03, 2007 10:17 pm
Thanked: 5 times

by moneyman » Tue Nov 25, 2008 12:30 am
OA is E

What is wrong with "dated to be" ?
Maxx
Top
Join the discussion
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

by parallel_chase » Tue Nov 25, 2008 4:15 am
gmat009 wrote:Can you explain why "dated to be" changes the meaning of sentence
I apologize for the delayed response. Here is the difference between the two.


Samples dated at 3 million years old - dated back in time

Samples dated to be 3 million years old - actual dated time

Let me know if you guys think otherwise, to be honest I am confused myself now.
No rest for the Wicked....
Top
Join the discussion
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

by parallel_chase » Tue Nov 25, 2008 4:32 am
I have PM Stacey and asked her to respond to this question.


Rock samples taken from the remains of an asteroid about twice the size of the 6-nuke-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

A. has been dated to be 3.47 billion years old and thus is

B. has been dated at 3.47 billion years old and thus

C. have been dated to be 3.47billion years old and thus are

D. have been dated as being 3.47 billion years old and thus

E. have been dated at 3.47billion years old and thus are
No rest for the Wicked....
Top
Join the discussion