— ?—They are reading books.A、What do they doB、What did they doC、What are they doing
— I can’t decide __________or not I should encourage my son to be a volunteer.— Why not? It will make him more helpful.
— Grandpa has changed a lot.— So he has. He used to _________ games with the children.
—________do you prepare for an exam?— By going over all my notes.
—What’s wrong with you?—I wasn’t careful enough and _______an old man while walking along the street.
—Shall we drink the tea now?—No, the tea should be ______in the water for some time before you drink it.