The context of the following conversation is Kai failed the first one hard, but she got it together and retook the practice test.:
Kai says I was so mad at myself for failing that test. I should have done so much better..
The friend responds That's what happens when you don't prepare as much as you should..
Kai responds I know. It was my fault. But I am so happy I had the chance to retake it..
The friend responds I'll bet you really buckled down and studied hard for that one..
Kai responds Totally. That's all I did for an entire week basically. It really paid off..
The friend responds That's great. Studying is the only thing that really works..