Ten year ago, I ______ in Lahore.

Will work

Had worked

Have worked

Worked

Explanation

Ten year ago, I had worked in Lahore.

دس سال پہلے میں نے لاہور میں کام کیا تھا۔

The past perfect tense "had worked" is used here to indicate an action that was completed before another point in time, in this case, ten years ago.