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She was so engrossed in her book that she didn't notice the time passing.
He was so engrossed in his book that he was oblivious to the commotion around him.
She was so engrossed in her book that she was miles away from the noisy cafe.
She was so engrossed in her book that she missed her metro stop.
He often became so engrossed in his work that he became oblivious to the passage of time, frequently forgetting to take breaks.
