I'm very ..... that I'm late but there is a train strike on at the moment.

I'm very ..... that I'm late but there is a train strike on at the moment. (*) sore (*) sorry (*) sorrow (*) sorrowful


This is a companion discussion topic for the original entry at https://english.best/questions/4675,im-very-___-that-im-late-but-there-is-a-train-strike-on-at-the-moment/