_____does this bike belong to 此题用whom还是who谢谢

_____does this bike belong to 此题用whom还是who谢谢 ＿＿＿does this new bike belong to?A who B whose C who's D whom 想知道是who does this book belong to?还是whom does this book belon 这句话为什么用who 不用whom啊 .who does this book belong to? Whom/Who does the bike belong to?为什么是does不是is? 英语翻译可以翻译成The bike to whom me belong.还是,用非限制性定语怎么表达? I dont't know whom this backpack belong to 还是 belongs to success will belong to those__never say impossible(who,whom) Who does this watch（belong）to? 1,who does this coat belong to? This book belongs to whom/who? ( )does this sth belong to? 空格里填who还是whose ?