Read the following passage and choose the best answers.
The Holes of the Human Body
Think about the holes in your body. Each hole has a special job.
Your nose has two holes. You breathe and smell with them. They also have small hairs inside. These hairs keep dust away.
Your skin has many tiny holes. Your sweat comes out of them. Sweat keeps your body cool when the weather is hot.
There is also a hole in your stomach. It is your belly button. Before you were born, a tube connected you and your mother. The tube fell off and left your belly button.
Our bodies have lots of holes. They are all very useful.