Let's hear it for Ears!

A All human ears have this tunnel.

B This tunnel is called the ear canal.

C Our senses receive messages for our body.

D Sound waves can come from many sources.

A The little bones move, and they make the liquid slosh around inside the tube.

B The little bones move, they make the liquid slosh around inside the tube.

C The little bones move and make the liquid slosh around inside the tube.

D No revision is needed

A Change It to they

B Remove the comma after barking

C Change talking to talked

D Make no change

A Change conected to connected

B Change bony to boney

C Change snail's to snails

D Make no change