I didn’t know that Joe had to get up early, so I didn’t wake him up. If I ___ that Joe had to get up early, I would have woken him up.


know


had known


knew


Выучи грамотный разговорный английский до уверенного владения всего за 9 месяцев по системе естественного усвоения иностранных языков. Жми!