他对这个决定仍有疑虑。

He still has ___doubts about this decision.

我怀疑他的承诺，因为他之前经常食言。

I ___doubt his promise because he often broke his word before.

他对是否接受这份新工作感到犹豫不决。

He's full of ___doubts about whether to accept the new job offer.