首字母填空Breathing is very important to everyone.You must breath
首字母填空
Breathing is very important to everyone.
You must breathe all the time to s_____ alive.If you try to hold your breath f_____more than about a minute ,your body will let you start breating again.The air that that you breathe is made up of many d_____ gases mixed together ,but your body only needs one of them,oxygen ,to keep you alive.If you ran out of oxygen,even for a very s____ time,you would die.
The air that you breathe out is warm and has water in it.You can see this i___ you breathe onto a mirror.The water in your breath cools down and forms a mist as it hits the cold mirror.