Помогите с выполнением домашней работы по английскому! Заранее спасибо!

1Radio was invented in R.by Popov.

2 A new president is elected in the USA every four years by people.

3 A bank robber was caught by the police last night.

4 Sorry,dogs aren't allowed in our safari park.

5 My letter will be left by the door by the postman.

6 A delicious cherry pie has been made for dinner by my mum.

7 My clock wasn't repaired by George.

8 Wait a minute, an interesting story is being told by my neighbor.