To put questions to the sentences(Поставить вопросы)
betty was reading a book the whole evening(what book)
i was waitaing for you aften (where)
jane and helen were talking loudly when i came in(what about)
we were watching tv at 7 oc'lock(what programme)
when the teacher came in the pupils were discussing a very interesting topic(what topic)
when i saw betty and jeft several hours ago they were layghting gaily(why)
granny was singing a song when i came in(what song)
when i returned home mother was still reading by the fire (what)

1)What book Betty was reading the wole evening?2)Where was I waiting for you after?3)About what Jane and Helen were talking loudly when i came in?4)What programme were we watching tv at 7 oc'lock?5)What topic the children were discussing when the teacher came?6)Why Betty and Jeft  were laughting gaily when i saw them?7)What song granny was singing when i came in?8)What mother still reading,when I returned home?Наверное так, но лучше проверить)