请高手回答，谢谢

宜用who, 而不用that的一些情况
⑴ 先行词是one, ones, anyone时。
例如：
① One who has nothing to fear for oneself dares to tell the truth.
② Don’t tell anyone about the news who oughtn’t to know it.
⑵先行词是those时。
例如：
① Those who were not fit for their work could not see the beautiful clothes made of the magic cloth.

宜用that, 而不用whot的一些情况

⑴ 先行词既有人又有物时。
例如：
① Do you know the things and persons that they are talking about?
② The bike and its rider that had run over an old man were taken to the police station.
⑵ 主句已有疑问词who 时。
例如：
Who is the woman that was praised at the meeting?

要注意的是：
⑴ 介词前提后，先行词是人，关系代词分别只能用whom而不再用that或who。
⑵ 介词前提后，关系代词不再能省略。