1 sentence

1. 许是他最近工作太累，竟然在开会时睡着了。

   xǔ​shì tā zuì​jìn gōng​zuò tài lèi, jìng​rán zài kāi​huì shí shuì​zháo le.

   Perhaps he was too tired from work lately; he actually fell asleep during the meeting.

   Source: Dong Chinese Dictionary