Have you seen Jack recently? I wonder ______ with his classmates.
Don’t go to _____ places where there is no fresh air.
Energy is ____ makes one work.
I know nothing about the accident except _____ I read in the paper.
There he pointed to _____ looked like a stone and said that’s ______ you had to carry home.
Both teams were in hard training; _____ was willing to lose the game.