1 sentence

1. 既然任务已经圆满完成，他显得十分自得。

   jì​rán rèn​wu yǐ​jīng yuán​mǎn wán​chéng, tā xiǎn dé shí​fēn zì​dé.

   Since the task was successfully completed, he appeared very self-satisfied.

   Source: Dong Chinese Dictionary