- I am worrying about our final exam these days.
- There is nothing to worry about ________ you work hard.( )
until
so that
as far as
as long as
--- What did he tell you just now?--- He said that ____________ tomorrow morning.
By the time Dave reached the small boat, a thick white fog _______ over the surface of the water.
The teacher told the kids that light ________ faster than sound.
He said that his car ______ stolen and he _______ have to telephone the police.
The English teacher told us this morning that we _____ an exam at the end of this month.