例句：Which of these cars has been sold to Nina?

翻譯：這些車中哪一部已經賣給 Nina？

例句：The cake which is on the table tastes good.

翻譯：桌子上的蛋糕嘗起來很不錯。

例句：Tell me which one you want.

翻譯：告訴我你想要哪一個。