改写同义句：There are a lot of things you could do.

题目

改写同义句：There are a lot of things you could do.
There are---- ---- things ---- you ---- ----.
lots of;what could do
对吗?感觉写错了,高手指教

答案

what ---that.
因为是定语从句,有了先行语,things ,所以能用what.