19. Teacher: Chris, you need to pay more attention to your attendance. Chris: ______I thought students could join clubs. Teacher: Clubs are fine, but you should also concentrate on your studies. Chris: I know. I’ll try to manage my time more effectively.
(A) But I’m sure the payment I made was correct.
(B) It was just because my grandmother was sick.
(C) I was practicing with the band I’m leading.
(D) I think it broke down a couple of days ago.