3 sentences

1. 面对大家的关切，他郑重地作出了承诺。

   miàn​duì dà​jiā de guān​qiè, tā zhèng​zhòng de zuò​chū le chéng​nuò.

   In the face of everyone's concern, he solemnly made a promise.

   Source: Dong Chinese Dictionary

2. 国际社会对该地区的紧张局势表示严重关切。

   guó​jì shè​huì duì gāi dì​qū de jǐn​zhāng jú​shì biǎo​shì yán​zhòng guān​qiè.

   The international community has expressed serious concern over the tensions in the region.

   Source: Dong Chinese Dictionary

3. 长辈的关切让他感到非常温暖。

   zhǎng​bèi de guān​qiè ràng tā gǎn​dào fēi​cháng wēn​nuǎn.

   The concern shown by his elders made him feel very warm.

   Source: Dong Chinese Dictionary