Mr. Smith stood up in defence of the 16-year-old boy, saying that he was not the person ____.

A．blamed

B．blaming

C．to be blamed

D．to blame

艾宾浩斯遗忘曲线显示，遗忘是有规律的，其规律是（　）。

A．先快后慢

B．先慢后快

C．先后一致

D．不快不慢