nǎ xiē
这次会议都有哪些人参加？
Zhè cì huìyì dōu yǒu nǎxiē rén cānjiā?
Which people are attending this meeting?
你们要讨论哪些问题？
Nǐmen yào tǎolùn nǎxiē wèntí?
What issues do you want to discuss?