3 sentences

1. 恪先生是这里的负责人。

   Kè xiān​sheng shì zhè​lǐ de fù​zé​rén.

   Mr. Ke is the person in charge here.

   Source: Dong Chinese Dictionary

2. 他对待长辈一向恪恭有礼。

   tā duì​dài zhǎng​bèi yī​xiàng kè gōng yǒu lǐ.

   He has always been respectful and polite toward his elders.

   Source: Dong Chinese Dictionary

3. 每一个公民都应当恪守法律。

   měi yī gè gōng​mín dōu yīng​dāng kè shǒu fǎ​lǜ.

   Every citizen should strictly abide by the law.

   Source: Dong Chinese Dictionary