Задание 3.A: Do you know Nick? B: I... him since he was a child.а) knows б) have known в) have been knowing г) is knowing

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Английский язык: Задание 3.A: Do you know Nick? B: I... him since he was a child.а) knows б) have known в) have been knowing г) is knowing​

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I have been knowing him since he was a child...

Задание 3.

A: Do you know Nick?
B: I... him since he was a child.

а) knows
б) have known
в) have been knowing
г) is knowing