—______ do you spell “classroom”?—I’m sorry I don’t know.
—Do you know if he ____ to play football with us? —I think he will come if he _____ free tomorrow.
This place is worth _______.
Not only his parents but also he ____ watching football games on TV.
I don’t know ______ to stay or go.
I don’t know _____ he will come or not tomorrow.