981. I want to expand my horizons.
982. I‘ve made a tough decision, sir. Here is my resignation.
983. I quit because I don’t wabt to be stuck in a rut. I want to move on.
984. First of all I ‘d like to say that I’ve really enjoyed working with you.
985. I’ve been trying, but I don’t think I’m up to this job.
986. I’ve been here for too long. I want to change my environment.
987. I’m sorry for bring up my resignation at this moment, but I’ve decided to study aboard.
988. To be honest, I’ve got a better order.
989. I’m running out of steam. I need to take a break.
990. I’m quitting because I want to try something different.