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GMAT Focus 1: 745 Q86 V90 DI85
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DmitryFarber Thanks for the great explanation. I have a somewhat similar query from a question that I came across on the actual GMAT and I am hoping you can resolve my confusion.

I have difficulty in using 'about which'. Sometimes I understand it, sometimes I get bogged down by it. Can you please tell which of these two sentences is more preferable per GMAT vocabulary?

He works for a TV network, about which I know nothing.
He works for a TV network (which) I know nothing about.

The actual question I came across on GMAT was slightly different and more difficult than the above. I wish I remembered more of the actual question but focusing on the question on the screen as if it were the only thing in the world that matters and then moving on to the next and giving it the same attention has its consequences.

Can you please use 'about which' in a more complex sentence and share a few scenarios where test takers might falter? Thank you so much in advance.
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DmitryFarber Thanks for the great explanation. I have a somewhat similar query from a question that I came across on the actual GMAT and I am hoping you can resolve my confusion.

I have difficulty in using 'about which'. Sometimes I understand it, sometimes I get bogged down by it. Can you please tell which of these two sentences is more preferable per GMAT vocabulary?

He works for a TV network, about which I know nothing.
He works for a TV network (which) I know nothing about.

The actual question I came across on GMAT was slightly different and more difficult than the above. I wish I remembered more of the actual question but focusing on the question on the screen as if it were the only thing in the world that matters and then moving on to the next and giving it the same attention has its consequences.

Can you please use 'about which' in a more complex sentence and share a few scenarios where test takers might falter? Thank you so much in advance.
When Which is followed by a preposition, we do not use a comma. For Instance, we do not use comma before in which, on which, and so on. So, 1st sentence is wrong because About is a Preposition and the portion following the comma is essential modifier.
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