Mr. Zhang has retired already. He       in our school for over thirty years.

A．has worked

B．had worked

C．worked

D．was working

下列关于惊恐发作的典型临床表现的说法正确的是（）

A.心悸、胸闷及窒息感

B.强烈的恐惧感、濒死感

C.觉得自己会失去控制或即将失去理智

D.历时较短，一般5～20min，少有超过1h者

E.多伴自主神经功能过度兴奋