妈妈轻声哼着摇篮曲，哄宝宝入睡。

Mom softly hummed a ___hush-a-bye to lull the baby to sleep.

奶奶轻轻摇晃着摇篮，哼着摇篮曲，动作轻柔舒缓。

Grandma rocked the cradle with a gentle ___hush-a-bye motion while singing a lullaby.