--- Where is your mother?

--- She _______ to Sichuan on business. She has ______ there four times recently.

A．has gone; gone

B．has been; been

C．has gone; been

D．has been; gone

下述属于孔子主张的是（）。

A.复归人的自然本性

B.兼爱

C.“不愤不启，不悱不发”

D.化民成俗，其必由学