—I don’t know what I _______ without the suitcase you lent me.

—Glad to have been of some help to you.

A．would have done

B．would do

C．should have done

D．should do

捣固车升降油缸活塞杆的连接螺纹以及球铰的工作状态要求每工作（）应对其进行检查。

A、100h

B、200h

C、300h

D、400h