My friend asked me to play ____ volleyball, but I’m tired and I don’t think I’ve got ____ energy.
The prisoners _____ to escape, but failed.
Hey, your serve is too fast. _____, okay?
He made _____ experiments to prove his theory, and the number _____ added up to 600.
Had it not been for your help, I _____ penniless today.
No one can _____ how to deal with the matter.