•Who did this?这是谁做的？

•Who's she?她是谁？

•Who are all those people?那些人是谁？

•She asked me if I knew who had got the job.她问我是否知道谁获得了那份工作。

•Who (also formalwhom)do you want to talk to?您要找哪位（接电话）？

•I don't know who (also formalwhom)to ask to the party.我不知道该邀请谁参加聚会。

•"Are they going to get married?" "Who knows ?" (= It is not possible to know at the moment.)“他们是要结婚了吗？”“谁知道呢。”

•Who can tell what will happen now?谁知道会发生甚么呢？

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•I think it was your Dad who phoned.我认为打电话的人是你爸爸。

•She's one of those people who love to be the centre of attention.她是那种喜欢引人注意的人。

•He rang James, who was a good friend as well as the family doctor.他打电话给詹姆斯，詹姆斯既是家庭医生又是他的好朋友。

•The other people who (also that)live in the house are really friendly.其他住在这所房子里的人十分友好。

•This is Gabriel, who (also formalwhom)I told you about.这是加布里埃尔，我跟你说起过他。

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•The guest list reads like a Who's Who of top American businessmen.宾客名单读起来像是美国巨贾豪商的名人录。