Kaa ,aku kurang mengerti tentang materi passive voice,tolong dijawab ya kaa...makasiii

<ol><li>A letter is going to be sent by Rina to abroad next month</li><li>A house is sold by Azizah next month</li><li>Tiona was called by Ali last night</li><li>Meatballs was being eaten by Alia when I passed her house</li><li>A ball will be kicked by Perdede tomorrow</li><li>A song is being sung by Anis now</li><li>Some books were returned by Gus Imin to the library two days ago</li><li>English will be learned by Prabowo next year</li><li>A rose is given by Ganjar to Mahfud everyday</li><li>An information is going to be explained by Gibran next week</li></ol><p>Maaf kalau ada yang salah ya..&nbsp;</p>