Plz help I need help and this is due today

Choose Three: What are the THREE functions/roles of the respiratory system? *
A.) Taking in Oxygen
B.) Taking in Hydrogen
C.) Removing Carbon Dioxide
D.) Removing Water

2.) Choose Two: What TWO statements are TRUE about oxygen? *
A.) The air you breathe is part of the Earth's atmosphere, the blanket of gases that surround the Earth.
B.) Oxygen makes up about 78% of the gases in the atmosphere.
C.) Your body uses all of the air that you breathe into your lungs.
D.) Most of the air you breathe in goes back into the atmosphere when you exhale.

3.) Fill in the Blank: is needed for the energy-releasing chemical reactions that take place inside your cells. *

4.) True/False: Breathing refers to the movement of air into and out of lungs. *
A.) True
B.) False

5.) True/False: During respiration, oxygen reacts with glucose to release energy. *
A.) True
B.) False

6.) What two main gases are exchanged by the respiratory system? *