这是我的嘴巴。

This is my ___mouth.

摸摸你的嘴巴。

Touch your ___mouth.

指向你的嘴巴。笑一笑!

Point to your ___mouth. Smile!

小狗张大嘴巴等着我喂它。

The puppy opened its ___mouth wide, waiting for me to feed it.

这条河的入海口形成了一个天然港口。

The river's ___mouth forms a natural harbor where it meets the sea.

她只是机械地重复着老师的话，根本不理解其中的意思。

She was just ___mouthing the teacher's words without really understanding them.