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Much of the basin that had been transformed into the Great Lakes by th [#permalink]
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Much of the basin that had been transformed into the Great Lakes by the Laurentide Glacier during the last ice age was formed by seismological events that occurred nearly one billion years earlier.

Much of the basin that had been transformed into the Great Lakes by the Laurentide Glacier during the last ice age was
Much of the basin that was transformed into the Great Lakes by the Laurentide Glacier during the last ice age had been
Much of the basin that was transformed into the Great Lakes by the Laurentide Glacier during the last ice age has been
The Laurentide Glacier during the last ice age transformed the Great Lakes from much of the basin that has been
During the last ice age, much of the basin that was transformed by the Laurentide Glacier into the Great Lakes had been
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
IMO, B


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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
The events have to be in the correct sequence in this question.
we need past perfect tense
A, C and D can be eliminated as they are simple past tense, present perfect tense and present perfect tense respectively
E - comma subject rule - out
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
nahid78 wrote:
Much of the basin that had been transformed into the Great Lakes by the Laurentide Glacier during the last ice age was formed by seismological events that occurred nearly one billion years earlier.

Much of the basin that had been transformed into the Great Lakes by the Laurentide Glacier during the last ice age was
Much of the basin that was transformed into the Great Lakes by the Laurentide Glacier during the last ice age had been
Much of the basin that was transformed into the Great Lakes by the Laurentide Glacier during the last ice age has been
The Laurentide Glacier during the last ice age transformed the Great Lakes from much of the basin that has been
During the last ice age, much of the basin that was transformed by the Laurentide Glacier into the Great Lakes had been


Seismological events (Event 1 in the past)---------> Transformation of the Basin (Event 2 in the past)


Past Perfect Tense issue, only option (B) works fine here , errors highlighted in red.
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
Abhishek009 wrote:
nahid78 wrote:
Much of the basin that had been transformed into the Great Lakes by the Laurentide Glacier during the last ice age was formed by seismological events that occurred nearly one billion years earlier.

Much of the basin that had been transformed into the Great Lakes by the Laurentide Glacier during the last ice age was
Much of the basin that was transformed into the Great Lakes by the Laurentide Glacier during the last ice age had been
Much of the basin that was transformed into the Great Lakes by the Laurentide Glacier during the last ice age has been
The Laurentide Glacier during the last ice age transformed the Great Lakes from much of the basin that has been
During the last ice age, much of the basin that was transformed by the Laurentide Glacier into the Great Lakes had been


Seismological events (Event 1 in the past)---------> Transformation of the Basin (Event 2 in the past)


Past Perfect Tense issue, only option (B) works fine here , errors highlighted in red.


Hi Abhishek,

I dont understand the difference between the B and E. Please elaborate why B over E. What's wrong with 'during the last ice age'?

Thanks,
Jon
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
Got it Dmitry. Thank you.

Regards,
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
OFFICIAL EXPLANATION:


This is a Tense/Timeline problem for which you’ll want to find the logical order of events. The sentence gives a big clue by, outside of the underline, mentioning that the seismological events took place a billion years “earlier”. So the order is that there were once seismological events, then later (but still in the past) the basin was transformed. This means that A is incorrect, as the “had been” tense puts the basin transformation earlier than the seismological events. C is also incorrect, as “has been” indicates that the transformation is still going on, but the sentence is clear that the last ice age is in the past. Choice D also uses “has been”, so it is wrong, too. Choice E also botches the timeline by leading with the modifier “during the last ice age”, suggesting that all events happened in that one timeframe. Choice B is correct, as it uses the proper timeline, putting the seismological events further back in time with “had been”.
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
B is actually a very clear, distinct and correct answer to this question.

All other options either twist the meaning or don't make any sense.
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
Here, past event happened earlier to another past event. So , we have to use had been .

c and D are wrongly using has been whic is wrong ----eliminate them.
now A,B,E

We know that seismological events happened before the past event so had been should be used here.
But,
A is using had been in the wrong place which is tense error. Eliminate A
Left with B and E.

During the last ice age, much of the basin that was transformed by the Laurentide Glacier into the Great Lakes had been
E distorts the meaning by modifier which is telling that everything has happened at same time(During the ice age).
B is the left over choice so pick it....The choice is using had been correctly
So B is the Winner.
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
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Re: Much of the basin that had been transformed into the Great Lakes by th [#permalink]
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