答案A
be sorry to do…“做……难过”．listen to意为“注意听”,表示有意识地去听,但不一定听见什么,强调“听”这个动作．如：We are listening to the radio．我们正在听收音机．They are listening to me．他们正在听我说．hear意为“听到、听见”,表示耳朵里听到了,但不一定是有意识去听的,强调“听”的结果．如：I heard someone laughing．我听见有人在笑．I am sorry to hear that news．听到那个消息我很难过．