Sentence Correction
This is one of the most important inventions of this century.

No correction required
invention of the centuries
invention of these century
invention of this century
invention of centuries

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Sentence Correction
In addition to enhanced their reputations through strategic use of philanthropy, companies are sponsoring social initiatives to open new markets.

to have their reputation enhancing
No correction required
of enhancing their reputation
to enhancing their reputation
to having enhance their reputation

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