He swore to keep his promise.

他发誓要遵守诺言。

youdao

I called on him to keep his promise.

我要求他遵守诺言。

youdao

You cannot trust him to keep his promise.

你可不能相信他会履行诺言。

youdao

He made me promise to keep his secret.

VOA: special.2009.07.25

To be sure, Mr Obama has many excuses for failing to keep his promise.

ECONOMIST: Maybe that has become the wrong question for Barack Obama

And he has failed to cut public spending to keep his promise of balancing the budget by 2012.

ECONOMIST: Europe and America

But there won't be much time to smell the flowers if Waitt is going to keep his promise to revive Gateway.

FORBES: Forbes Faces: Ted Waitt