It was (so / such) a difficult test that many students didn’t pass?
It was (
so
/
such
) a difficult test that many students didn
’
t pass
It was (
so
/
such
) a difficult test that many students didn
’
t pass
It was (
so
/
such
) a difficult test that many students didn
’
t pass
It was (
so
/
such
) a difficult test that many students didn
’
t pass