12. When ______ to Oxford University? A has he gone B was he going C did he go D has he been going

**C did he go** *Explanation:* The question refers to a specific point in the past and asks about a completed action, so the past simple tense is required. The correct option is 'did he go'. *Перевод: Когда он поехал в Оксфордский университет?*