make up sentences in present perfect past perfect or past simple

Make up sentences in present perfect past perfect or past simple using the words in brackets .
1. they meet their opponents . (just)
2. you not play your best game . (yet)
3. I buy the tickets. (by the time of their arriual )
4. I visit a game of cricket . ( when I was in London last year )
5. The coach talk to him. (yesterday)
6. I write an email to the sponsor . (just)
7. According to legend , the ancient Olympic Game to be founded by Herdcle the son of Zeus .
8. I participate in two competitions. (since I began exercising )
9. We hear the news about your wins . (already)
10. Over 10,000 athletes I take part in the Olympic Games. (last year)