He argued with the rich man, hoping the rich man would keep his promise.

他和富人争论，希望富人遵守他的诺言。

youdao

There is no doubt that he will keep his promise and I am sure that he will do what he said.

毫无疑问，他会信守诺言，我相信他会言行一致。

youdao

I wonder if he will keep his promise.

我想知道他是否会遵守他的诺言。

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