He has become a millionaire and owns a big computer company. He is really _________ great

He has become a millionaire and owns a big computer company. He is really _________ great success in _________ business.

A. a; 不填 B. the; the C. a; the D. 不填；不填

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He has become a millionaire and owns a big computer company. He is really _________ great

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