犹豫片刻后，他打开了门。

After a moment's ___hesitation, he unlocked the door.

她毫不犹豫地接受了挑战。

She accepted the challenge without the slightest ___hesitation.

他在谈判中的犹豫暴露了他对条款的不确定。

His ___hesitation during the negotiation revealed his uncertainty about the terms.