3 sentences

1. 他点头表示允诺。

   tā diǎn​tóu biǎo​shì yǔn nuò.

   He nodded in agreement.

   Source: Dong Chinese Dictionary

2. 他慨然应诺，接下了这个艰巨的任务。

   tā kǎi​rán yīng nuò, jiē​xià le zhè​gè jiān​jù de rèn​wu.

   He readily agreed and took on this arduous task.

   Source: Dong Chinese Dictionary

3. 诺！臣领旨。

   nuò! chén lǐng zhǐ.

   Yes! I obey your decree.

   Source: Dong Chinese Dictionary