男性，31岁，活动后心悸、心跳停搏感1个月。查体：心律不规则，有间歇。心电图示QRS波提前出现，宽大畸形，其前无P波，T波与主波方向相反，可判断为（）

A.正常心律

B.阵发性室上速

C.房颤

D.窦性心动过缓

E.室性期前收缩

Fred’s grandfather _______three years ago. He _______for three years.

A．died; died

B．was dead; died

C．died; has been dead

D．died; has died