He is learning about the human skeleton.

This specimen is preserved in formalin.

He used tinder to start a campfire.

The mast is swaying in the wind.

It's better for him not to know the truth. After all, ignorance is bliss.

This fish has already been boned.

We made a reservation for the room.

We are reserving those funds for the future.

He started walking at a fast pace.

The baby needs a baby bottle.