Now keep your promise and drink these few drops of water.

现在遵守你的诺言，把这几滴水喝了。

I'm hoping you'll keep your promise to come for a long visit.

我希望你会信守诺言，来这里多呆一段时间。

You should keep your promise.

你应当遵守诺言。

You don't keep your promise.

你没有信守你的承诺。

Please keep your promise in mind.

请记住你的承诺。