----How long does it take us to go to your hometown from here?

----It takes us      hour or more to go to my hometown by       train.

A．an; a

B．a ; an

C．an; /

D．a; /

下列业务中（）是单笔业务。

A、普通贷记业务

B、定期贷记业务

C、定期借记业务

D、其他支付业务