nǐ shàng cì dāying dài tā qù dòngwùyuán, tā xiànzài tiāntiān niàndao, nǐ kě bié qīngyì chéngnuò

你上次答应带她去动物园，她现在天天念叨，你可别轻易承诺。

You promised to take her to the zoo last time, and now she brings it up every day; don't make promises lightly.