Normally, it will be quite a few years _______ an earthquake-stricken area returns to what it used to be. But Wen Chuan in China has created a miracle.    [ ]

A. when

B. that

C. before

D. since

Ⅲ度房室传导阻滞伴短阵室性心动过速，首选（）

A.利多卡因

B.阿托品

C.心室起搏

D.电复律

E.心房起搏