Choose the right variant.
1.___beforehand, we___the catastrophe.
a) did we know, would prevent
b) would we know, had prevented
c) had we known, would have prevented
d) should we know, had prevented
2.1 don't know how___him. I wish I___his name.
a) address, did not know
b) to address, knew
c) addressing, would know
d) to address, should know
3.1 look forward to___a rest. I___as if my head _ splitting.
a) having, feel, were
b) having, feel myself, were
c) have, had felt, were
d) have, am feeling, is