With her heart pounding, she opened the door.

His heart was pounding as he told me that.

My heart was pounding as my turn got nearer.

The horses galloped across the field, their hooves pounding against the ground.

The horse galloped across the field, its hooves pounding against the ground.

My heart is pounding so hard it feels like it's going to explode.

My head's still pounding but I don't have a temperature any more.

When I was a child I would get so excited the night before a school excursion that my heart would be pounding and I couldn't sleep.

It is sold by the pound.

Flour is sold by the pound.