In the final exam of last term, our maths teacher Mr.Wu gave us ________we all couldn’t work out .
----I’m sorry, but there is no smoking on this flight. ----Oh, I _____ that. Sorry, I won’t again.
The thing that _____ is not whether you fail or not, but whether you try or not.
—Have you finished your homework yet? —Not yet, I ___ to do it just a few minutes ago.
Off the east, the sky looked pale enough to ____ the storm would be passing quickly.
The sound of the music ____louder and louder as the band marched nearer to me.