tīng dào / zhè ge / yì wài / de / xiāo xi / tā / yì shí / měng rán / bù zhī dào / gāi / xiān / huí dá / nǎ ge / wèn tí

听到这个意外的消息，他一时懵然，不知道该先回答哪个问题。

After hearing the unexpected news, he was confused for a moment and did not know which question to answer first.