Question

We have not yet decided........the venue of the meeting

Answer 1

I think the answer is ON.
We have not yet decided on the venue of the meeting.

Answer 2

The correct fill in the blank is about.

• The word about is a preposition.
• The word is generally used to make a rough estimate about an object or an event.
• Since, in the sentence the venue is not decided yet, thus about will be used.
• Thus, the correct sentence is We have not yet decided about the venue of the meeting