(对)He admired that which looked beautiful. 他赞赏外表漂亮的东西。
(对)He admired those who looked beautiful. 他赞赏那些外表漂亮的人
(错)He admired that who danced well. (that 作宾语时不能指人)
(对)He admired those who danced well.他赞赏跳舞好的人。 (those 指人)
(对)He admired those which looked beautiful.他赞赏那些外表漂亮的东西
(those 指物)