Answer:
2.
Explanation:
If you take the three choices you have and plug them into the sentence you will have:
- Do you the we met in the past?
- Do you think we have been meeting in the past?
- Do you think we would met in the past?
The only one of these sentences which requires no change to its structure and no add-ons to the verbs would be 2.
- Do you think we have met in the past?
- Do you think we have been meeting in the past?
- Do you think we would meet in the past?
