这块海绵是我们店里最柔软的。

This sponge is the ___softest one in our shop.

他握着她的手，用最轻柔的声音道歉。

He held her hand and apologized in the ___softest tone.

在所有老师中，史密斯先生是对作业要求最宽松的。

Among all the teachers, Mr. Smith has the ___softest requirements for homework.

婴儿房里播放着最轻柔的音乐。

The ___softest music was playing in the nursery.