Peter was so excited     he received an invitation from his friend to visit Chongqing. [ ]

A. where    

B. that    

C. when    

D. why

急性心肌梗死引发的室性心动过速首选（）

A.奎尼丁

B.维拉帕米

C.普罗帕酮

D.利多卡因

E.地高辛