system
apprehensive: I have felt this way while getting ready for graduate school.
gpt
I am getting ready to apply to graduate school, and I am feeling a little nervous.
gpt
I'm sure you'll do great! Have you been preparing?
gpt
I have, I am getting ready to take my graduate exam in 2 weeks. 
gpt
Good luck! don't be nervous. I'm sure you'll knock it out of the park!