What will you be doing at 4:00 tomorrow afternoon?—I _____ in my office

________listen to music in class. —Sorry, I won’t do it again.

unday he promised ________ today, buthe hasn’t appeared yet.

Why are you late again?—Something happened to our friend Wang Fei. I _____ to help him.

Though they are______little children , they have worked out _______many difficult math problems.