预激综合征患者伴发心房颤动时可选用的药物是（）。

A.毛花苷丙

B.利多卡因

C.普罗帕酮

D.维拉帕米

E.腺苷

All the people in the nation can remember exactly how many years ago _______ the civil war broke out.

A．was it that

B．it was when

C．it was that

D．was it when