There were so many beautiful things that it was hard to choose.请问这句话里that引导什么从句

问题描述:

There were so many beautiful things that it was hard to choose.
请问这句话里that引导什么从句

so that结果状语从句

so.that 引导结果状语从句.意思是:如此...以致,这个词组可以和too..to 进行替换