in August he will have been working here for ten years 5 вопросов1) Общий вопрос2) Альтернативный вопрос3) Разделительный вопрос4) Специальный

1 Will he have been working here for ten years in August?
2 Will he have been working here for ten years in August or in September?
3 He will have been working here for ten years in August, won't he?
4 Who will have been working here for ten years in August?