Choose the correct answer

2
Grammar
1
In the past, why
that memorising things was an
effective learning method?
a were teachers used to believing
b were teachers believing
c did teachers use to believe
C
d would have teachers believe
'Can I have your results from the science experiment,
please, Mildred?'
'I'm afraid I
a yet
haven't finished it, Mrs Hollis.'
b still
c already
3
Peter
d just
for an important exam all night, so he was
very tired in the morning.
a would study
C
c had studied
b was studied
d had been studying
4
'No, but my sister
'Have you visited any of London's museums?'
to Tate Modern twice.
a has gone
b has been
c
has been going
d will go