His great grandfather was among the first to settle in what is now the famous mountain resort.此句中的连接词为什么用what?that或者where不行吗?

问题描述:

His great grandfather was among the first to settle in what is now the famous mountain resort.
此句中的连接词为什么用what?
that或者where不行吗?

宾语从句,用that无先行词,用where则从句缺主语