Помогите, пожалуйста! Передайте последующие предложения в Passive Voice. 1. I saw

1. I saw a UFO yesterday. - A UFO was seen by me yesterday. 2. Mike has just read a very interesting book. - A very interesting book has just been read by Mike. 3. Angela often writes letters to her boyfriend. - Letters are often written by Angela to her boyfriend. 4. They had pulled down the house before the revolution began. - The house had been pulled down by them before the revolution began. 5. He will pass his exam successfully. - His exam will be passed successfully by him. 6. I must do this work in time. - This work must be done by me in time. 7. She will send a mail soon. - A mail will be sent by her soon. 8. We are giving a party now. - A party is being given by us now. 9. I brought the documents last week. - The documents were brought by me last week. 10. He always invites a lot of friends to his birthday party. - A lot of friends are always invited by him to his birthday party.