Fill in the blank with the correct adverb:-

I _________ met him at the conference on Sunday but discussed a lot of things.

Briefly

The correct answer is Option (3) - Briefly

The sentence is:
I _________ met him at the conference on Sunday but discussed a lot of things.

• Always → doesn’t fit with a single occasion.

• Never → makes the sentence illogical (if you never met him, you couldn’t have discussed).

• Finally → doesn’t connect well here, as it implies something awaited.

• Briefly → correct, because it means the meeting was short in time, yet a lot was discussed.

So the correct sentence is:
I briefly met him at the conference on Sunday but discussed a lot of things.