abroad for years, the old professor returned to the place where he was grew up. A. Having ——青夏教育精英家教网—

摘要： abroad for years, the old professor returned to the place where he was grew up. A. Having been B. Being C. To be D. To having been

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______ abroad for years, the old professor returned to the place where he was grew up.
A. Having been B. Being C. To be D. To having been

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