1、说完这些话2、从百度文库里面找到了以下内容,你看看吧I. it/one /that三者均可用作代词, 指代前面提到的名词。一般说来, it指代同名同物; one与that则指代同名异物。I have lost my umbrella; I'm looking for it. (该句中it就是指前面的my umbrella)I have lost my umbrella; I think I must buy one. (one在该句中表泛指, 因为my umbrella已经丢了)The umbrella you bought is cheaper than that I bought. (替代词that在该句中特指“the um