问题描述: I am grateful for all _____you have done for me.what taht 还是which为什么 1个回答 分类:英语 2014-11-30 问题解答: 我来补答 填that. that引导定语从句,修饰all, that也可省略.what只能引导名词从句,不能引导定语从句.若用what, 应去掉all,这时what就成了宾语从句. 展开全文阅读