2 sentences for 應 (yīng — agree)

1. 既然你已经应了下来，就不能反悔。

   jì​rán nǐ yǐ​jīng yīng le xià​lai, jiù bù néng fǎn​huǐ.

   Since you've already agreed to it, you can't go back on your word.

   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