I hurried because I wouldn't be late for class.
选A,意思是"我加快了速度,因为我不想迟到."
I hurried so that I wasn't late for class.
选B,so that 是"以至于"的意思,表结果,"我加快了速度,以至于我没有迟到".
Tom went to meeting room ten minutes early in order that he ____ a good rest.
选could get;是前后时态一致的表现.