If I had heard that news before, I............
will tell you.
would tell you.
would have told you.
would have been teling you.
I wonder.........a better teacher than ours.
if is there
whether there is
is there
there is
Suitcases..........immediately after receiving the boarding passes.
should be checking
could have checked
being checked
have to be checked
Only the students...............registered in advance can go to class.
which
who
if
what