哪一位

bù zhī nín nǎ yī wèi a

不知您哪一位啊？

Who may you be?

nǐ men zhōng jiān nǎ yī wèi shì wáng xiān sheng

你们中间哪一位是王先生？

Which one of you is Mr. Wang?

nǎ yī wèi yìng pìn zhě dé dào le zhè fèn gōng zuò

哪一位应聘者得到了这份工作？

Which of the applicants has got the job?