what引导主语从句的时候在从句中充当is reported的主语
但是that不可以在从句中充当成分
that is reported in the newspaper is that more than one hundred people were killed in that big fire.
这句句子从句部分是缺少主语的.that这个词特殊在于只有主语从句标志的作用.其他的疑问词除此以外都可以在句子里充当一定的成分
您的采纳是我的动力~