以下属于心律失常中冲动传导异常的有（）
A.心房颤动
B.房室传导阻滞
C.期前收缩
D.预激综合征
E.窦性停搏
参考答案：B, D
Having now __ 40, he feels that his football career is coming to an end.
A．gone
B．turned
C．become
D．entered
