murmur|murmured

她发出一声表示同意的低语作为回应。

She responded with a quiet ___murmur of agreement.

“现在去睡觉吧，”她低声说。

"Go to sleep now," she ___murmured.

我能听见门后传来低沉的说话声。

I could hear the low ___murmur of voices from behind the door.