It was ten years _______ he returned to his hometown and set out to revenge his dead father.

A．since

B．that

C． before

D． when

“博学之、审问之、慎思之、明辨之、笃行之”的学习过程论出自于( )。

A．《孟子尽心上》

B．《论语学而》

C．《庄子应帝王》

D．《礼记中庸》

E．《诗经国风》