哪一个 哪一個

狗和猫你更喜欢哪一个？

Gǒu hé māo nǐ gèng xǐ huan nǎ yī ge?

Which do you prefer, dogs or cats?

我们觉得很难决定买哪一个。

Wǒ men jué de hěn nán jué dìng mǎi nǎ yī ge.

We're finding it difficult deciding on which one to buy.

你见到的是两兄弟中的哪一个？

Nǐ jiàn dào de shì liǎng xiōng dì zhòng dì nǎ yī ge?

Which one of the two brothers did you see?