When we came back she was drinking tea.
While I was having a bath the telephone rang.
Yesterday at 3 English lesson was passing.
I was working at school 3 years ago.
I was helping mygrandmother in the garden.
Were you in London last year? (здесь Past Simple, паст континиус как то здесь не вяжестя - were you being in london.... вроде так не говорят)