下列哪种药物有阻断Na+通道的作用：

A．氢氯噻嗪

B．氯酞酮

C．呋塞米

D．乙酰唑胺

E．阿米洛利

By the time I reached home, my parents _______the dinner for me already.[ ]

A. had cooked            

B. cooked

C. have cooked            

D. cook