两个都对.so that引导目的状语从句.不过这个that也可以省略.
so that省略that(现代英汉综合大辞典)：
Speak louder so the people in the hall can all hear you.
大声点讲,以便大厅里的人都能听清.
北师大高中英语模块1Unit1：I'll put some warm water in the basin so you can wash your face.(P12)