–– It is ridiculous that John wants to make academic progress but never devotes any time to it.

––– Maybe it’s time for him to know______.

A．heaven never helps the man who will not act

B．he who makes constant complaint gets little compassion.

C．hope for the best, but prepare for the worst

D．It is easy to be wise after the event.

曲池在五输穴中，属（）。

A.井穴

B.荥穴

C.合穴

D.经穴

E.输穴