miàn / duì / tú / rán / de / tí / wèn / tā / yī / shí / měng / bī / bù / zhī / dào / gāi / zěn / me / huí / dá

面对突然的提问，他一时懵屄，不知道该怎么回答。

Faced with the sudden question, he was momentarily stunned and didn't know how to respond.