I regret ________ that you have failed the exam, but what you should do now is not to regret ______ so much time but to seize every moment from now on.

A．to inform; wasting

B．informing; to waste

C．to inform; to waste

D．informing; wasting

除胎盘附着处外，宫腔内膜修复时间约在产后（）。

A．2周

B．3周

C．4周

D．5周

E．6周