miàn duì / tūrúqí lái de / zhìwèn / tā / miàn bù gǎi sè de / shuōmíng / le / shìqing / jīngguò

面对突如其来的质问，他面不改色地说明了事情经过。

Faced with the sudden questioning, he calmly explained what had happened without batting an eyelid.