1.If he had taken my advice, he-.a rich man now.
a.would be
b.would have been
c.had been
d.were
2.If I-.that you were in hospital, I-.
a.had known/ would have visited
b.had known/ would visit
c.knew/would visit
d.knew/ would have visited
3.I'd have visited you if I-.you-.in hospital.
a.had known/were
b.had known/are
c.have known/were
d.knew/had been