Change the following sentences into the opposite voice.
8 My house was broken into by a thief last night.
9 The typhoon has destoryed many houses.
10 The gate will be closed by an old man at midnight.
11 Have the results been heard by you yet?
12 Betty will be forgiven by her mother.
13 Peter must hand in the application form before the deadline.
14 A chicken was being roasted by the cook.
15 A speech has been delivered by the Governor at the opening ceremony of our school.