__ + my birthday
of
on
in
to
__ + the 21st century
in
on
at
of
I am __ vacation
in
of
on
at
I have been studying English __ last year.
-
in
since
for
I have been studying English __ a year.
for
since
-
in
I started studying English __ last year.
-
since
for
in
The child fell asleep __ the movie
of
on
during
with
The store is open __ 9 PM, so we should go shopping before 9 PM.
until
for
during
since
