He didn’t regret saying what he did but felt that he ____ it differently.

A．could express

B．would express

C．could have expressed

D．must have expressed

福勒和布朗根据教师的需要和不同时期所关注的焦点问题，把教师的成长划分为（ ）几个阶段。

A．关注成绩

B．关注生存

C．关注情境

D．关注学生