1,is
2,am,areThis___a pencil.It___Tom's.is,is___your sister a doctor？Yes,she___.呵呵 ，请新开问题！Helen and John___my classmates.They___(not)Chinese.Thattheir classroom.The studentsin it.Howyour father？ Hefine. But my mother(not) fine.Where Kate and Joan？They England.