Answer:
1. Have Had
2. Be Been
3. Go Went
4. But Bought
5. Meet Met
6. See Saw
II :
1. Did you have your breakfast yet?
2. Where did he go?
3. Have you ever been an actor?
4. He ____ just saw the new Bond movie
5. I went to buy a new pair of jeans
6. I have never been to Australia