So absorbed          in our talk that my brother took a wrong turn on the way to the airport.

A．he wat

B．is he

C．was he

D．he is

SAH患者病情稳定1周，神志由嗜睡到昏睡，左侧偏瘫和偏身感觉障碍。复查脑MRI无明显脑室扩大，脑脊液检查无新鲜红细胞。最可能的原因是()

A．蛛网膜下隙出血再发

B．脑动脉瘤破裂

C．脑积水

D．脑血管痉挛

E．脑内继发感染