Question

you _ run five kms in your youth.​

Answer 1

Answer:

You used to run five kms in your youth.

Explanation:

Question:

you -----run five kms in your youth.

Answer:

You used to run five kms in your youth.

*The words ought to,used to,need and dare are

Semi modals/Quasi modals.

*Used to is mentioned in discontinued habit.

*So the answer is,

You used to run five kms in your youth.