What is your long-range objective?

The key is to focus on your achievable objectives and what you are doing to reach those objectives.

For example:
“Within five years, I would like to become the very best accountant your company has on staff. I want to work toward becoming the expert that others rely upon. And in doing so, I feel I'll be fully prepared to take on any greater responsibilities which might be presented in the long term. For example, here is what I'm presently doing to prepare myself . . .”
Then go on to show by your examples what you are doing to reach your goals and objectives.