Вставьте слово в нужной форме 1 Of course, almost everyone in the world___ of the Harry Potter books HEAR 2 The story___when

Of course, almost everyone in the world has heard of the Harry Potter books. The story begins when young Harry receives an invitation to go to a boarding school for wizards and witches. Hogwarts is believed to have many typical features of British boarding schools. But many people think that the books became so popular among teenagers and youngsters because much of the time the main characters live and act without any adults around.