— It seems that Mr. Wu is standing there.

— It ______ be him because he called me from Canada just now.

A．mustn’t

B．can’t

C．needn’t

D．shouldn’t

符合职业道德规范“公道”的基本要求的做法是（）。

A.轻重缓急一个样

B.待遇高低一般齐

C.遵守制度一致化

D.奖励惩罚一刀切