— Do you know Henry didn't win that speech contest?

— _____? I thought he would. He worked so hard on it. [ ]

A. Do I

B. Don't I

C. Did he

D. Didn't he

男孩，5岁。自幼唇、指（趾）甲床青紫，乏力，活动后气促，体格发育落后，胸骨左缘第2-3肋间可闻及Ⅲ级收缩期杂音，经超声心动图证实为先天性心脏病，法洛四联症。

此患儿突然发生昏厥、抽搐最可能并发（）。

A．支气管肺炎

B．充血性心力衰竭

C．低钙惊厥

D．脑血栓，脑脓肿

E．癫痫