that 既可以指人,也可以指物 指人的情况:(这是可以用who代替) Wang Fei is the only person in our school that will attend the meeting. 指物的情况:(有时可以用which代替),下面的例句不能 There seems to be nothing that is impossible to him in the world. 既可以指人也可以指物的情况:(只能用that) They talked about the persons and things that they liked at school.