помогите с дз по англ

when I arrived the lecture ...already
a)started b)was starting c) had started

He ...a bath when the telephone rang
a) had b)was liaving c)will have

I ...from her lately
a) don't hear b)haven't heard c)hadn't heard

I ...here for ten years
a)live b)was living c)have lived

We ...the bus. Now we'll have to walk
a)have missed
b)missed
c)were missing
ПОЖАЛУЙСТА НАПИШИТЕ ПОЧЕМУ ВЫБРАЛИ ТОТ ИЛИ ДРУГОЙ ОТВЕТ