--- _________________? --- I have a headache.
I enjoy playing computer games, but I can't spend too much time ________ that.
________ is bad for your eyes ________ TV too much.
She is ________ poor ________ buy that nice dress.
—How often do I need to feed the dog?—It ________ food every day, or it will be hungry.
—It's difficult to get to the other side of the river.—I think a bridge ________ over the river.