Here are the responses in the Past Simple tense:
1. Yesterday was Maya’s birthday. She was happy.
2. I was five years old.
3. Were you at the library? No, I wasn't.
4. It was cold yesterday.
5. They were good tennis players.
6. I was at home at the moment.
7. Were Yuval and Ron good friends?
8. Was your friend on vacation?
9. Was the test difficult? No, it wasn't.
10. When was the next bus? At eleven o'clock.