Common subordinating conjunctions

Builders use plywood in the construction of small boats ......... it is easy to shape.
although
because
after
while

I haven't spoken with Jane ......... she moved.
unless
while
since
although

Airplanes sometimes fly to unscheduled cities ......... the weather is bad.
when
where
wherever
whereas

Please read the book ......... it's still available from the library.
before
although
since
while

Everybody had dessert ......... they finished eating the main course.
while
because
until
after

The pep rally won't begin ......... the last class of the day has ended.
until
so that
since
than

Elena will groom the horse in the morning ......... she can ride it in the afternoon.
until
unless
so that
when

You will receive extra credit ......... you turn in your project early.
although
than
if
unless

The concert will end at 10.30 p.m. ......... the audience insists on several encores.
while
unless
though
as

......... they feel threatened, dogs sometimes display aggressive behavior.
Until
During
When
Before