Toshiyori-no hitorigurashi-wa shinpai-da. (I'm worried about how senior citizens live alone.)

Situation 1: Mr. Okubo is chatting with his senior colleague Mr. Hashimoto about his parents.

橋本： ぼくは母親に毎日電話をしているよ。年寄りの一人暮らしは心配だからね。