一直都知道it和which不能指代句子,但prep详解里有下面的内容 VII. it与that均可以替代上文全句的内容或部分内容, 而one /ones则不可以(本条为日常语法中常用,而GMAT中it与that无法指代上文全句,)。 He has saved my life; I'll never forget it. (it代替第一分句) Tom is painting his house. I am told he does it every four years. (it代替前面分句的部分内容painting his house) Let's say we meet here at three o'clock. That ought to give you