My suggestion that we should stick to our original plan was finally accepted.

题目

My suggestion that we should stick to our original plan was finally accepted.
为什么不用which而用that?

答案

这里that we should stick to our original plan 是同位语从句.看了下面的语法解释和例句你就明白了.
1.在复合句中用作同位语的从句叫同位语从句.它一般跟在某些名词后面,用以说明该名词表示的具体内容.
　　I heard the news that our team had won．我听到了我们队获胜的消息.
同位语从句
2.可以跟同位语从句的名词通常有news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等（一般的“抽象”名词都可用）.
　　I’ve come from Mr wang with a message that he won’t be able to see you this afternoon． 我从王先生那里来,他让我告诉你他今天下午不能来看你了.
3.英语中引导同位语从句的词通常有连词that,whether,连接代词what,who.连接副词how,when,where等.（注：if,which 不能引导同位语从句.）
　　He must answer the question whether he agrees to it or not.他必须回答他是否同意这样一个问题.
4.有时同位语从句可以不紧跟在说明的名词后面,而被别的词隔开.
　　The thought came to him that maybe the enemy had fled the city． 他突然想起可能敌人已经逃出城了.