Here are the key steps in the activity:
1. Students pair up with someone from the other group.
2. Without showing their worksheets, they write guesses for their partner's answers in a chart.
3. Take turns asking the questions from their worksheets.
4. Partners answer in the correct past tense.
5. Write the actual answers in the chart.
6. Check guesses and tally correct guesses. The student with the most right wins.
The goal is speaking practice asking and answering questions in the past simple and continuous tenses. It's a guessing and checking activity to reinforce the grammar forms.