Air is all a----It is around us when we s--- and play.From the time we are b----- ,air is aroundevery side .When we s---down,it is around us.When we go to bed ,air is a----- around us.We l-------in air.

问题描述:

Air is all a----It is around us when we s--- and play.From the time we are b----- ,air is around
every side .When we s---down,it is around us.When we go to bed ,air is a----- around us.We l-------in air.