Here is the solution:
1. The radio was invented by Popov in Russia.
2. A new president is elected every four years in the USA.
3. A bank robber was caught by the police last night.
4. Sorry, dogs are not allowed in our safari park.
5. My letter will be left by the postman by the door.
6. A delicious cherry pie has been made by my mum for dinner.
7. My clock was not repaired by George.
8. Wait a little, an interesting story is being told by my neighbor.
9. Some more articles about football can be written by my son.
10. Your bedroom must be cleaned by you tonight.