-Mike, why did you make no reply to me when I called your name in the street just now?

-Sorry, Tom. I_______ to my mother on the phone.

A．am talking

B．was talking

C．talked

D．had talked

7个月男患儿，反复发作性快速点头样痉挛伴双上肢外展，下肢和躯干屈曲。1～2岁发现有智力低下。EEG为高度节律失调。4岁后发作停止。最可能的诊断（）

A.特异性综合征

B.特殊综合征

C.早期肌阵挛性脑病

D.West syndrome

E.Lennox-Gastaut syndrome