Here are the correct tenses of the verbs filled into the sentences:

1. I don't know where my wallet is. I wish I **knew** where my wallet was. (know)
2. Michael is playing with the older boys in the park. I wish Michael **would play** with them. (play)
3. Things are not good in the country. I hope everything **gets** better. (get)
4. I am tired of hearing your screaming. It is time you **stopped** screaming in my ear! (stop)
5. I can't go to the pool with my friends because I can't swim. Oh, I wish I **could swim**. (swim)
6. Veronica doesn't like calling boys. I really wish she **would call** me. I want to go out with her. (call)
7. David and Christian are at the cinema right now. I hope they **enjoy** themselves. (enjoy)
8. You are a great guy, Jimmy, but I don't love you. I wish I **loved** you. (love)
9. This party is so boring and Gina is not coming. It is time I **left**. I'm tired of being here. (leave)
10. Tommy is a great piano player. I wish I **could play** the piano just like him. (play)