【简答题】Air is all round us.It is around us___ 31_ ___we walk and play.From the time we are born,air is around us on every side.When we sit down,it is around us.When we go to bed.air is 32 around us.We live 3...
【简答题】阅读理解。 Air is all around us. At the time we are born, air is around us everywhere (任何地方). We live in air. All living things need air. Living things cannot live without(没有) air. We can go without food o...