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Writing 12 Online
OpenStudy (cathyangs):

In the part "...for decades, if not centuries, to come. " is the second comma necessary?

OpenStudy (anonymous):

Yes because 'if not centuries' can be removed from the sentence without changing the meaning of the sentence. Therefore, it should be surrounded with commas.

OpenStudy (cathyangs):

Ok, thank you.

OpenStudy (anonymous):

No problem!

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