Forgive me if I'm wrong, but haven't we met before.
如果我弄错的话请原谅我,我们以前见过面吧?
What were you doing when I called?
我打电话给你时你在干吗?
since her parents had impressed upon her that it would be unforgivable to miss it and cause the friends with whom she was going to stay to make two journeys to meet her.