12.( ) A: What’s wrong with you? You look so sad.B: I saw a car running into an old man on my way here.A: Oh, that’s terrible.B: __________________.
(A) The driver drove too carefully to notice the old man crossing the road.
(B) The driver drove so carefully that he didn’t notice the old man crossing the road.
(C) The driver drove fast enough to notice the old mancrossing the road.
(D) The driver drove so fast that he didn’t notice the old man crossing the road.