When you get you r paper back,pay special attention to ( what) have been marked.
问题描述：
When you get you r paper back,pay special attention to ( what) have been marked.
为啥不用which表示一个范围 表范围的具体是怎样
答
which在定从里指物做主宾表,这里是做介词to的宾语从句,在从句里做主语,指物,只能用what.参加定从和名从里what和which用法的区别.which不是也可以引导名从吗