Answer (EN)
- 5. He's not here. He must have gone out.
Translation (RU)
- 5. Его здесь нет. Он, должно быть, ушел.
Brief Explanation: The modal perfect 'must have gone' is used to express a strong belief or deduction about a past event. It suggests that based on the current situation (he's not here), the most logical conclusion is that he has gone out.