Помогите, пожалуйста! Передайте следующие предложения в Passive Voice. 1. I saw a UFO yesterday. 2. Mike has just read a very interesting book. 3. Angela often writes letters to her boyfriend. 4. They had pulled down the house before the revolution began. 5. He will pass his exam successfully. 6. I must do this work in time. 7. She will send a mail soon. 8. We are giving a party now. 9. I brought the documents last week. 10. He always invites a lot of friends to his birthday party.

1 A UFO was seen yesterday. 
2 A very interesting book  has just been read by Mike.
3 Angela s  boyfriend  is often written letters to by Angela.
4.The house had been pulled down  before the revolution began. 
5  His exam  will be passed hsuccessfully.
6. This work must be done  in time.
7. A mail will be  sent  by her soon.
8. A party is being given by us  now.
9. The documents were brought by me last week. 
10. A lot of friends aew always invited  to his birthday party.