Choose the correct answer

3
Peter
for an important exam all night, so he was
very tired in the morning.
a would study
c had studied
b was studied
d had been studying
'Have you visited any of London's museums?'
4
'No, but my sister
to Tate Modern twice.
a has gone
b has been
c has been going
d
will go
5 You have the determination, so I'm sure that you'll
do very well in life.
a to succeed
c succeeding
b of succeeding
d to have succeeded